I've got some videos on Vimeo that I want move over to my new channel on YouTube. I can download what Vimeo lists as the 'Original' files, ~2GB H.264 MP4s (20-30mins).
Does YouTube re-encode regardless of the incoming format, or does it just re-mux? I don't want any more video degradation than necessary; I figure YT will re-encode to optimize for delivery to other resolutions / bit-rates, but if my original files are 720p, will they get re-encoded / go through another lossy pass when re-uploaded to YouTube?
And to be clear, these are all /my/ videos (I'm the creator on both channels), so not trying to move someone else's content.