From Scripts to Screen: Making YouTube Splits

How to Make a Creative Split-screen Video for YouTube?

Liza Brown

Oct 26, 2023• Proven solutions

If we talk about post-production techniques and visual effects, then Split Screen has to be one of the smartest picks. After all, it lets us narrate our story via two (or more) screens and gives our audience a superior viewing experience. Though, a lot of users find it hard to implement the split-screen effect on YouTube videos. Here, I will let you know how to come up with all kinds of YouTube split-screen videos by using a professional video editor.

Part 1: The Diverse Applications of Split-screen Videos

Before we discuss how to work on YouTube split-screen videos, let’s quickly consider some major applications of this video effect.

• To draw a direct comparison

One of the most popular applications of split-screen videos is for comparing two or more instances or perspectives in the same frame. For example, you might wish to depict the lifestyle of two people from different parts of the world or simply compare the effect of various seasons in a single video.

• To provide two or more perspectives

Videos are the best visual storytelling tools and just like any story, they can also have different perspectives. Ideally, the split-screen effect would be one of the best ways to show your audience all kinds of perspectives that can take place in your story.

One of the best examples was depicted in the movie “500 Days of Summer” in which we got several Expectations vs. Reality shots. These split-screen shots depicted the two major perspectives of the story in a single frame.

• To implement the cloning effect

Have you ever wondered how filmmakers create a clone of a person in movies? To do that, we make the protagonist record both the scenes in front of the same background. Later, we implement a split-screen effect in which both the clips are combined in such a way that it makes the audience believe as if the scene has both, the character and their clone placed flawlessly.

Watch Video! Use Split-Screen for Your YouTube Videos

Part 2: How to Make Creative YouTube Split-screen Videos with Wondershare Filmora ?

If you want to come up with professional YouTube split-screen videos, then consider using a resourceful tool like Wondershare Filmora. Recently, the company has launched Wondershare Filmora for Mac V10.2 with an upgraded set of newly-added split-screen templates . Therefore, you can simply use the wide range of split-screen templates in Filmora and drag-and-drop your videos to implement the effect.

• Wondershare Filmora has recently added an extensive range of split-screen templates that you can instantly use and customize to meet your requirements.
• Apart from YouTube split-screen templates, you can also find options for other social platforms such as Instagram, Facebook, TikTok, etc.
• Without undergoing any technical hassle, you can just drag and drop your videos to the split-screen template and further make the needed changes.
• There are also dedicated options to edit the split-screen video, apply color correction, and even implement different stunning animated effects.
• Besides that, you can use Filmora to access numerous other editing options like motion tracking, keyframing, audio ducking, auto reframing, action cam editing, and more.

Creating or editing YouTube split-screen videos in Wondershare Filmora is extremely easy and can be done in the following way:

Step 1: Import the Videos You Want to Edit to Wondershare Filmora

Before you edit your YouTube split-screen video, you need to import clips to the application. To do this, just launch Wondershare Filmora on your system and click on the “Import” button to load your videos. You can also go to its Menu > File > Import Media to do the same.

Step 2: Select the Split-screen Template and Add Your Videos

Great! Once you have loaded the interface of Filmora, you can locate a “Split Screen” section from the top. Just click on it to browse a wide range of split-screen video templates for YouTube to include two, three, or more clips. You can just double-click any template to get its preview and drag-and-drop it to the timeline to start working on it.

If you want, you can take the playhead and drag the pointer to adjust the length of the split-screen template on the timeline. To add your clips, just double-click on the split-screen template and click on the drop icon from the preview window. Now, click on the source clip to add it to the template and adjust its position to get the desired effects.

Click here

Step 3: Edit Your YouTube Split-screen Video

Following the same drill, you can include multiple clips to the YouTube split-screen template. You can further go to its editing features and explore the “Video” tab to scale, reposition, or rotate your clips. There are also options to add borders in the split-screen effect to separate the clips distinctively in the video.

Apart from that, you can also go to the “Color” section to access various color correction features. From here, you can adjust the brightness, temperature, saturation, tint, and other effects in the video.

If you want to make your YouTube split-screen video more appealing, then go to the “Motion” feature. Here, you can easily implement any existing animated template for transitions and other effects.

Besides that, you can also click on the edit icon from the bottom panel of the Preview section to edit your videos separately.

Step 4: Export the YouTube Split-screen Video

That’s it! Once you are done editing the split-screen video, you can export it from Filmora and save it on your Mac. Just click on the Export option and select a location to save the YouTube split-screen video. There are also additional features to save the video in different formats, video resolutions, and frame rates here that you can explore.

There you go! After following this guide, you would be able to come up with all kinds of YouTube split-screen videos on your Mac. Ideally, with the help of a resourceful tool like Wondershare Filmora, working on a split-screen video is an effortless task. Since the tool has numerous split-screen templates for YouTube, you can just select any template, and customize it to create a stunning YouTube split-screen video in minutes.

Liza Brown

Liza Brown is a writer and a lover of all things video.

Follow @Liza Brown

Liza Brown

Oct 26, 2023• Proven solutions

If we talk about post-production techniques and visual effects, then Split Screen has to be one of the smartest picks. After all, it lets us narrate our story via two (or more) screens and gives our audience a superior viewing experience. Though, a lot of users find it hard to implement the split-screen effect on YouTube videos. Here, I will let you know how to come up with all kinds of YouTube split-screen videos by using a professional video editor.

Part 1: The Diverse Applications of Split-screen Videos

Before we discuss how to work on YouTube split-screen videos, let’s quickly consider some major applications of this video effect.

• To draw a direct comparison

One of the most popular applications of split-screen videos is for comparing two or more instances or perspectives in the same frame. For example, you might wish to depict the lifestyle of two people from different parts of the world or simply compare the effect of various seasons in a single video.

• To provide two or more perspectives

Videos are the best visual storytelling tools and just like any story, they can also have different perspectives. Ideally, the split-screen effect would be one of the best ways to show your audience all kinds of perspectives that can take place in your story.

One of the best examples was depicted in the movie “500 Days of Summer” in which we got several Expectations vs. Reality shots. These split-screen shots depicted the two major perspectives of the story in a single frame.

• To implement the cloning effect

Have you ever wondered how filmmakers create a clone of a person in movies? To do that, we make the protagonist record both the scenes in front of the same background. Later, we implement a split-screen effect in which both the clips are combined in such a way that it makes the audience believe as if the scene has both, the character and their clone placed flawlessly.

Watch Video! Use Split-Screen for Your YouTube Videos

Part 2: How to Make Creative YouTube Split-screen Videos with Wondershare Filmora ?

If you want to come up with professional YouTube split-screen videos, then consider using a resourceful tool like Wondershare Filmora. Recently, the company has launched Wondershare Filmora for Mac V10.2 with an upgraded set of newly-added split-screen templates . Therefore, you can simply use the wide range of split-screen templates in Filmora and drag-and-drop your videos to implement the effect.

• Wondershare Filmora has recently added an extensive range of split-screen templates that you can instantly use and customize to meet your requirements.
• Apart from YouTube split-screen templates, you can also find options for other social platforms such as Instagram, Facebook, TikTok, etc.
• Without undergoing any technical hassle, you can just drag and drop your videos to the split-screen template and further make the needed changes.
• There are also dedicated options to edit the split-screen video, apply color correction, and even implement different stunning animated effects.
• Besides that, you can use Filmora to access numerous other editing options like motion tracking, keyframing, audio ducking, auto reframing, action cam editing, and more.

Creating or editing YouTube split-screen videos in Wondershare Filmora is extremely easy and can be done in the following way:

Step 1: Import the Videos You Want to Edit to Wondershare Filmora

Before you edit your YouTube split-screen video, you need to import clips to the application. To do this, just launch Wondershare Filmora on your system and click on the “Import” button to load your videos. You can also go to its Menu > File > Import Media to do the same.

Step 2: Select the Split-screen Template and Add Your Videos

Great! Once you have loaded the interface of Filmora, you can locate a “Split Screen” section from the top. Just click on it to browse a wide range of split-screen video templates for YouTube to include two, three, or more clips. You can just double-click any template to get its preview and drag-and-drop it to the timeline to start working on it.

If you want, you can take the playhead and drag the pointer to adjust the length of the split-screen template on the timeline. To add your clips, just double-click on the split-screen template and click on the drop icon from the preview window. Now, click on the source clip to add it to the template and adjust its position to get the desired effects.

Step 3: Edit Your YouTube Split-screen Video

Following the same drill, you can include multiple clips to the YouTube split-screen template. You can further go to its editing features and explore the “Video” tab to scale, reposition, or rotate your clips. There are also options to add borders in the split-screen effect to separate the clips distinctively in the video.

Apart from that, you can also go to the “Color” section to access various color correction features. From here, you can adjust the brightness, temperature, saturation, tint, and other effects in the video.

If you want to make your YouTube split-screen video more appealing, then go to the “Motion” feature. Here, you can easily implement any existing animated template for transitions and other effects.

Besides that, you can also click on the edit icon from the bottom panel of the Preview section to edit your videos separately.

Step 4: Export the YouTube Split-screen Video

That’s it! Once you are done editing the split-screen video, you can export it from Filmora and save it on your Mac. Just click on the Export option and select a location to save the YouTube split-screen video. There are also additional features to save the video in different formats, video resolutions, and frame rates here that you can explore.

There you go! After following this guide, you would be able to come up with all kinds of YouTube split-screen videos on your Mac. Ideally, with the help of a resourceful tool like Wondershare Filmora, working on a split-screen video is an effortless task. Since the tool has numerous split-screen templates for YouTube, you can just select any template, and customize it to create a stunning YouTube split-screen video in minutes.

Liza Brown

Liza Brown is a writer and a lover of all things video.

Follow @Liza Brown

Liza Brown

Oct 26, 2023• Proven solutions

If we talk about post-production techniques and visual effects, then Split Screen has to be one of the smartest picks. After all, it lets us narrate our story via two (or more) screens and gives our audience a superior viewing experience. Though, a lot of users find it hard to implement the split-screen effect on YouTube videos. Here, I will let you know how to come up with all kinds of YouTube split-screen videos by using a professional video editor.

Click here

Part 1: The Diverse Applications of Split-screen Videos

Before we discuss how to work on YouTube split-screen videos, let’s quickly consider some major applications of this video effect.

• To draw a direct comparison

One of the most popular applications of split-screen videos is for comparing two or more instances or perspectives in the same frame. For example, you might wish to depict the lifestyle of two people from different parts of the world or simply compare the effect of various seasons in a single video.

• To provide two or more perspectives

Videos are the best visual storytelling tools and just like any story, they can also have different perspectives. Ideally, the split-screen effect would be one of the best ways to show your audience all kinds of perspectives that can take place in your story.

One of the best examples was depicted in the movie “500 Days of Summer” in which we got several Expectations vs. Reality shots. These split-screen shots depicted the two major perspectives of the story in a single frame.

• To implement the cloning effect

Have you ever wondered how filmmakers create a clone of a person in movies? To do that, we make the protagonist record both the scenes in front of the same background. Later, we implement a split-screen effect in which both the clips are combined in such a way that it makes the audience believe as if the scene has both, the character and their clone placed flawlessly.

Watch Video! Use Split-Screen for Your YouTube Videos

Part 2: How to Make Creative YouTube Split-screen Videos with Wondershare Filmora ?

If you want to come up with professional YouTube split-screen videos, then consider using a resourceful tool like Wondershare Filmora. Recently, the company has launched Wondershare Filmora for Mac V10.2 with an upgraded set of newly-added split-screen templates . Therefore, you can simply use the wide range of split-screen templates in Filmora and drag-and-drop your videos to implement the effect.

• Wondershare Filmora has recently added an extensive range of split-screen templates that you can instantly use and customize to meet your requirements.
• Apart from YouTube split-screen templates, you can also find options for other social platforms such as Instagram, Facebook, TikTok, etc.
• Without undergoing any technical hassle, you can just drag and drop your videos to the split-screen template and further make the needed changes.
• There are also dedicated options to edit the split-screen video, apply color correction, and even implement different stunning animated effects.
• Besides that, you can use Filmora to access numerous other editing options like motion tracking, keyframing, audio ducking, auto reframing, action cam editing, and more.

Creating or editing YouTube split-screen videos in Wondershare Filmora is extremely easy and can be done in the following way:

Step 1: Import the Videos You Want to Edit to Wondershare Filmora

Before you edit your YouTube split-screen video, you need to import clips to the application. To do this, just launch Wondershare Filmora on your system and click on the “Import” button to load your videos. You can also go to its Menu > File > Import Media to do the same.

Step 2: Select the Split-screen Template and Add Your Videos

Great! Once you have loaded the interface of Filmora, you can locate a “Split Screen” section from the top. Just click on it to browse a wide range of split-screen video templates for YouTube to include two, three, or more clips. You can just double-click any template to get its preview and drag-and-drop it to the timeline to start working on it.

If you want, you can take the playhead and drag the pointer to adjust the length of the split-screen template on the timeline. To add your clips, just double-click on the split-screen template and click on the drop icon from the preview window. Now, click on the source clip to add it to the template and adjust its position to get the desired effects.

Step 3: Edit Your YouTube Split-screen Video

Following the same drill, you can include multiple clips to the YouTube split-screen template. You can further go to its editing features and explore the “Video” tab to scale, reposition, or rotate your clips. There are also options to add borders in the split-screen effect to separate the clips distinctively in the video.

Apart from that, you can also go to the “Color” section to access various color correction features. From here, you can adjust the brightness, temperature, saturation, tint, and other effects in the video.

If you want to make your YouTube split-screen video more appealing, then go to the “Motion” feature. Here, you can easily implement any existing animated template for transitions and other effects.

Besides that, you can also click on the edit icon from the bottom panel of the Preview section to edit your videos separately.

Step 4: Export the YouTube Split-screen Video

That’s it! Once you are done editing the split-screen video, you can export it from Filmora and save it on your Mac. Just click on the Export option and select a location to save the YouTube split-screen video. There are also additional features to save the video in different formats, video resolutions, and frame rates here that you can explore.

There you go! After following this guide, you would be able to come up with all kinds of YouTube split-screen videos on your Mac. Ideally, with the help of a resourceful tool like Wondershare Filmora, working on a split-screen video is an effortless task. Since the tool has numerous split-screen templates for YouTube, you can just select any template, and customize it to create a stunning YouTube split-screen video in minutes.

Liza Brown

Liza Brown is a writer and a lover of all things video.

Follow @Liza Brown

Liza Brown

Oct 26, 2023• Proven solutions

If we talk about post-production techniques and visual effects, then Split Screen has to be one of the smartest picks. After all, it lets us narrate our story via two (or more) screens and gives our audience a superior viewing experience. Though, a lot of users find it hard to implement the split-screen effect on YouTube videos. Here, I will let you know how to come up with all kinds of YouTube split-screen videos by using a professional video editor.

Part 1: The Diverse Applications of Split-screen Videos

Before we discuss how to work on YouTube split-screen videos, let’s quickly consider some major applications of this video effect.

• To draw a direct comparison

One of the most popular applications of split-screen videos is for comparing two or more instances or perspectives in the same frame. For example, you might wish to depict the lifestyle of two people from different parts of the world or simply compare the effect of various seasons in a single video.

• To provide two or more perspectives

Videos are the best visual storytelling tools and just like any story, they can also have different perspectives. Ideally, the split-screen effect would be one of the best ways to show your audience all kinds of perspectives that can take place in your story.

One of the best examples was depicted in the movie “500 Days of Summer” in which we got several Expectations vs. Reality shots. These split-screen shots depicted the two major perspectives of the story in a single frame.

• To implement the cloning effect

Have you ever wondered how filmmakers create a clone of a person in movies? To do that, we make the protagonist record both the scenes in front of the same background. Later, we implement a split-screen effect in which both the clips are combined in such a way that it makes the audience believe as if the scene has both, the character and their clone placed flawlessly.

Watch Video! Use Split-Screen for Your YouTube Videos

Part 2: How to Make Creative YouTube Split-screen Videos with Wondershare Filmora ?

If you want to come up with professional YouTube split-screen videos, then consider using a resourceful tool like Wondershare Filmora. Recently, the company has launched Wondershare Filmora for Mac V10.2 with an upgraded set of newly-added split-screen templates . Therefore, you can simply use the wide range of split-screen templates in Filmora and drag-and-drop your videos to implement the effect.

• Wondershare Filmora has recently added an extensive range of split-screen templates that you can instantly use and customize to meet your requirements.
• Apart from YouTube split-screen templates, you can also find options for other social platforms such as Instagram, Facebook, TikTok, etc.
• Without undergoing any technical hassle, you can just drag and drop your videos to the split-screen template and further make the needed changes.
• There are also dedicated options to edit the split-screen video, apply color correction, and even implement different stunning animated effects.
• Besides that, you can use Filmora to access numerous other editing options like motion tracking, keyframing, audio ducking, auto reframing, action cam editing, and more.

Creating or editing YouTube split-screen videos in Wondershare Filmora is extremely easy and can be done in the following way:

Step 1: Import the Videos You Want to Edit to Wondershare Filmora

Before you edit your YouTube split-screen video, you need to import clips to the application. To do this, just launch Wondershare Filmora on your system and click on the “Import” button to load your videos. You can also go to its Menu > File > Import Media to do the same.

Step 2: Select the Split-screen Template and Add Your Videos

Great! Once you have loaded the interface of Filmora, you can locate a “Split Screen” section from the top. Just click on it to browse a wide range of split-screen video templates for YouTube to include two, three, or more clips. You can just double-click any template to get its preview and drag-and-drop it to the timeline to start working on it.

If you want, you can take the playhead and drag the pointer to adjust the length of the split-screen template on the timeline. To add your clips, just double-click on the split-screen template and click on the drop icon from the preview window. Now, click on the source clip to add it to the template and adjust its position to get the desired effects.

Step 3: Edit Your YouTube Split-screen Video

Following the same drill, you can include multiple clips to the YouTube split-screen template. You can further go to its editing features and explore the “Video” tab to scale, reposition, or rotate your clips. There are also options to add borders in the split-screen effect to separate the clips distinctively in the video.

Apart from that, you can also go to the “Color” section to access various color correction features. From here, you can adjust the brightness, temperature, saturation, tint, and other effects in the video.

If you want to make your YouTube split-screen video more appealing, then go to the “Motion” feature. Here, you can easily implement any existing animated template for transitions and other effects.

Besides that, you can also click on the edit icon from the bottom panel of the Preview section to edit your videos separately.

Step 4: Export the YouTube Split-screen Video

That’s it! Once you are done editing the split-screen video, you can export it from Filmora and save it on your Mac. Just click on the Export option and select a location to save the YouTube split-screen video. There are also additional features to save the video in different formats, video resolutions, and frame rates here that you can explore.

There you go! After following this guide, you would be able to come up with all kinds of YouTube split-screen videos on your Mac. Ideally, with the help of a resourceful tool like Wondershare Filmora, working on a split-screen video is an effortless task. Since the tool has numerous split-screen templates for YouTube, you can just select any template, and customize it to create a stunning YouTube split-screen video in minutes.

Liza Brown

Liza Brown is a writer and a lover of all things video.

Follow @Liza Brown

Why Choose YouTube’s AV1 for Impeccable Video Playback?

Do you notice that many YouTube videos have been streamed in AV1? YouTube AV1 just happened suddenly a few years ago. This article will inform you about all the things you want to know about AV1 Youtube settings. I will let you know the tutorial to turn in AV1 settings on YouTube and the reason why should choose AV1 along with the others, and some more things about AV1.

Part 1: How to turn on AV1 settings on YouTube?

Do you wonder how to turn on AV1 settings on YouTube? For your information, AV1 is a video codec that is developed by a consortium of companies. It offers you advanced compression, enabling you to do smoother HD streaming and data savings for the video. Google also has already implemented AV1 use on YouTube. To turn on AV1 settings on YouTube, here are the steps:

Step1Go to playback and performance

• To turn on the AV1 settings, go to your YouTube account, after that click “Playback and Performance”.
• In the AV1 settings. Besides “Auto (Recommended)”, there are other two options, which are “Prefer AV1 for SD” and also “Always prefer SD”.
• “Always Prefer AV1” uses the codec whenever it is available for a video while “Prefer AV1 for SD” limits it to SD videos. There are two options to avoid low-performance devices when AV1 videos are played on YouTube. You can select “Always Prefer AV1” to see if your device performance is good enough when you play videos on YouTube that support AV1.

Step2Test if the AV1 settings are already enabled in your video

You may ask how to confirm your YouTube videos are playing with AV1 Codec. Well, you can search playlist on YouTube with the keywords “4K, 5K, and 8K videos with the new AV1 Codec “. You can test it by playing one of the videos. You have to right-click on the media player and then select “Stats for nerd”. If it shows the av01 codec there, then the AV1 settings are enabled already.

Part 2: Why choose AV1 over VP9 and other formats?

Now, do you need a reason why you should choose AV1 compared to VP9 and the others? As you know, there is also another video codec like VP9. There are also the others such as VVC, and many more. So what is the superiority of AV1 over the others? I will let you know why you should choose AV1 in this part.

The main thing is, as mentioned before, AV1 is developed by a consortium of companies founded in 2015. It is supported by The Alliance for Open Media (AOMedia) such as Amazon, Facebook, Google, Microsoft, and Netflix, and also by web browser developers and semiconductor firms. Aomedia made it clear the algorithm is free-to-use. It means that there are no greedy negotiators that will be dependent on the developers.

Also, these days, with a format that provides a much smaller workload for internet providers. Their today focus is, that AV1 can reach the quality but can get the job done with 20% more efficiency. Then, with AV1 encoding, a “standard” 4K movie will be much more accessible than it is now. These are some more reasons why you should choose AV1.

1. Royalty-free

As mentioned before, AV1 is royalty-free. AV1 is such a next-generation of royalty video codec. It means that it is not just free to use, but also free of charge, obligations, or even liability. It is an open and royalty-free video codec that the video platform will not charge to pay royalties to the Moving Picture Experts Group (MPEG), the developer of video codecs.

When it comes to the group that will ask for the royalty, MPEG is not the only one. There are also other patent groups and companies that can ask for it. Aomedia integrated Google, Mozilla, and Cisco, while they were busy creating their new video codec. However, the three companies joined together to create one codec to beat them all.

2. Better performance

It is said that the AV1 codec is 30% more efficient. According to the tests conducted by Moscow State University, AV1 can outperform AV1 by about 28% in the efficiency of encoding and decoding. As per the performance graph from the Graphics & Media Lab Video Group, MSU below, AV1 can offer the exactly same quality as X264 at 55% of the average bitrate.

AV1 is designed so exclusively to function better than all the other codecs in the market. It is an open-sourced codec with simple patent licensing, and the integration manages to save, as mentioned, up to 30% of the bandwidth for the exactly same image quality. In other words, with AV1, distributors can send streams much faster and cheaper and we can enjoy higher definitions in the same bandwidth.

3. AV2 to come in the future

AV1 is undoubtedly superior if we compare it to other available video codecs and the exploration of the codec technology AV2 has already begun. This is such an early performance evaluation. There is some interesting part of the exploration development of AV2, such as multiple line selection for Intra prediction can make you select not just neighboring row/column for directional prediction. The same tool also exists in VVC.

There are also three essential improvements, which are simplifying the existing feature (also complete removal) and picking the tool used by VVC/H.266 (It is lack originality but so much work on it) and improvement periodically improvement of an existing tool, it is too few and also not original. We haven’t known yet when AV2 will be done completely though, maybe there still be some more essential improvements.

Part 3: What’s the best video editor for YouTubers with AV1 format?

When we talk about YouTube, it feels incomplete if we don’t talk about the video editor. So, what is the best video editing software for YouTubers with AV1 format? Yes, it is Filmora . It is such a great video editing software that allows you to import and edit many video file formats. Filmora also allows users to export AV1 MP4 format video and then can directly upload it to YouTube.

Filmora gives some ways to export your videos. Here are the five ways. You can also customize the export settings then you can save them to reuse the same settings next time. The first is you can export your project file and video to the local computer. It supports export as MP4, AVI, WMV, AV1, MOV, GoPro Cineform, F4V, MKV, TS, and 3GP.

After that, you can export your video to any device you want, such as iPhone, iPad, Apple TV, Apple TV 4K, iPod, Samsung Galaxy, Smart Phone, Android Generic, Google Pixel, Xbox One, PlayStation 4, PSP, and Smart TV. Then you can upload it to YouTube, Filmora provides you to export your video to Youtube directly. All you need to do is logging your Youtube account and export.

Free Download For Win 7 or later(64-bit)

Free Download For macOS 10.14 or later

Part 4: FAQ: Does YouTube use AV1 or VP9?

For today, YouTube encodes all the videos with the VP9 codec, but for some reason displays for low view count videos. AV1 usage also had been pushed to very low view counts. When it comes to cost or quality tradeoffs, AV1 took about 18 times longer to encode than x264.

Free Download For macOS 10.14 or later

Part 4: FAQ: Does YouTube use AV1 or VP9?

For today, YouTube encodes all the videos with the VP9 codec, but for some reason displays for low view count videos. AV1 usage also had been pushed to very low view counts. When it comes to cost or quality tradeoffs, AV1 took about 18 times longer to encode than x264.

Also read: