使用 AV1 进行 YouTube 视频播放
当前为
AV1 is highly recommended for Windows 11 and MacOS users. Higher Quality and Lower Bandwidth is provided.
Opposite Script: Disable YouTube AV1
https://caniuse.com/?search=AV1%20video%20format

Important Note: Some 2K & 4K videos are still running with VP9 and no AV1 encoding is provided.
AV1 will be used over VP9 as possible. (Higher Quality & Higher Compression)
AV1 is not yet supported in hardware decoding.
VP9 is usually supported in hardware decoding in modern PC.
