Mp4: 609

VP9 encoding often provides better quality at a lower bitrate (smaller file size) compared to older H.264 formats.

Older hardware or software (like older versions of QuickTime) may struggle to play VP9 video, even inside an MP4 container. 609 mp4

Understanding Format 609: How to Download 720p MP4s with yt-dlp VP9 encoding often provides better quality at a

Because it is a DASH (Dynamic Adaptive Streaming over HTTP) stream, it contains no audio. If you download it by itself, you will have a silent video. How to Download 609 with Audio 609 mp4

If you download only Format 609, your player might show a black screen or play without sound. Always remember to use the + syntax to add an audio ID.