399 Mp4 | CERTIFIED WORKFLOW |

AV1 ( av01 ), which is a modern, royalty-free codec designed for better compression and quality compared to older formats.

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 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 AV1 ( av01 ), which is a modern,

Format is a video-only stream used by YouTube for high-quality content. Key characteristics include: Resolution: 1080p (Full HD). AV1 ( av01 )