(In this example, 399 is the 1080p AV1 video and 140 is the standard M4A audio stream.) Why Choose 399?
AV1 ( av01 ), which is a modern, royalty-free codec designed for better compression and quality compared to older formats. 399 mp4
If you want to manually select this format to ensure you get the AV1 1080p version, you would use a command similar to this in your terminal: yt-dlp -f 399+140 [VIDEO_URL] Use code with caution. Copied to clipboard (In this example, 399 is the 1080p AV1
Format is a video-only stream used by YouTube for high-quality content. Key characteristics include: Resolution: 1080p (Full HD). Copied to clipboard Format is a video-only stream
Usually wrapped in an MP4 container, though it is technically "video-only" and must be merged with an audio stream (like itag 140) to create a playable video file. How to use it in yt-dlp