So I noticed this recently after downloading a couple of videos from YouTube. I thought I was seeing things but I really noticed when I downloaded the same video I did a couple of days ago and compared them:
Some other video bitrates even go below 900kbps where as before it would be around the 1500kbps mark.
I'm downloading via IDM.
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But is it the exact same video ie from the same channel/uploader or some upload from another account ?
There are always multiple formats of the same 1080p video available (typ. using different codecs)
- Check whether the original video format is still present in the list with youtube-dl -F url
- and/or if the two videos use the same codec with mediainfo
Youtube affects more bitrate to VP9, AV1 than h264...
It's not recently, its the same process since forever
Youtube compresses the videos after a while, popular videos faster (sometimes within 1h) so its best to download new videos asap
In a livestream the quality is usually lower than the later archived version
sometimes it also happens that a video gets bigger, like a few days ago; first it was like 430MB and a day later it was 7xxMB (1080p avc DASH137) but its usually getting smaller after a while
And a month later it usually will be recompressed again
Last edited by nimrahwt; 20th Jan 2021 at 08:37.