well theres your problem right there:
if you used to be able to download stuff at speeds of 300ish Kbps and your internet now is only 111kbps (you always gotta add a "." before the last digit when using speed test to know exactly what your internet is). So it would appear that your internet has taken a plunge. heres some likely problems:
1: your using IE. download firefox and use it and see if it makes it better.
2: someone/something is using up your internets
3:I notice you were up at 1:37AM when doing that speed test (sorry, just wanted to point it out :P)
4

omething happened with your internet that would cause this (perhaps virii would do it, always scan your comp!)
5: perhaps the person you were downloading from was jsut busy. WAIT scratch that, I didnt read the youtube part, so nvm on this idea.
6: GAH I had something i was thinking about but its gone... ill edit if i remember.