Didn't torrents solve this problem before Youtube was even invented? Also, it looks like Bilibili is going to expand internationally and they have a pretty good chance of eating Youtube's lunch.

I don’t really see how torrents solved this problem as so many seeders for any file could simply disappear. Not to mention, the significantly higher bandwidth costs of higher resolution video nowadays.

I’m less familiar with bilibili, but afaik it doesn’t do many of the revenue-sharing programs that YouTube does, so might have trouble attracting the same creators. They also have so far been pretty regional and so I’m not sure if we can use them as a sign of success yet.