Where does piracy and illegal acts stop? Technically Youtube has stolen content all over it, as well as nearly every other website on earth. Where is the line drawn? 
i can imagine youtube will have a huge chunk of their video archive removed. a considerably huge chunk, maybe not a whole lot though. it goes by what the senate's definition of a 'rogue' site is; i recall reading that the consequences could be pretty bad: less than five days to remove everything and serious court threat action against them if people can't do it in time.
while it's focus is to strike down on pirating, the definition for them appears to be very loose and pretty much means just about everything. i've seen folks write on blogs about videos that weren't intended to be pirating at all still get the perma-ban from youtube and songwriter complaints, so it's like, "wtf".
censoring the internet is a bad idea. best to just leave it as it is. if folks had known that with computers and networking comes distribution, and emphasis in the modern times for digital means of getting things around like songs, videos, games, whathaveyou, they shoulda thought things out more.
i don't see it as being the end of days, lol, but they couldn't have picked a better time to help contribute-- or at least make an already downtrodden economy even worse.