> 100 hours of video are uploaded to YouTube every minute.
"Backup" may be a strong term here. Perhaps you mean "mirror of specific videos"? I suppose in this regard, YouTube is acting as a reference index.
(I feel like such a pessimist today.)
"Subsection (b), service provider caching, exempts service providers’ making local copies of Web pages so that the pages don’t have to be fetched repeatedly over the Internet."
It doesn't sound like random people making copies of specific YouTube videos would qualify as "service providers". In the case of YouTube videos, wouldn't YouTube be the service provider who is allowed to create cached copies, like on a CDN?
From a legal point of view, making copies of YouTube videos available to the public would seem to be a straightforward violation of the video creators' copyrights, except in cases where they license the videos in a way that specifically allows such copying. I'd expect that copyright owners would get upset about this.
I'll fill out the README a bit more now, thanks for the feedback :)
I can't imagine that GitHub would be entirely happy about this, and it still leaves a third party (GitHub), functioning as registrar of torrents, vulnerable to attack, just as any public torrent tracker is.
