slow youtube video buffering?

[Fanatic4Christ]

what causes this? i don't get it.... it just started doing it outta the blue and it doesn't do it on my friends computer, my internet speed is at around 4.5k constantly with around a 40 ping and like a 500kb upload so i doubt its the internet, any suggestions?? takes like 2-3 mins to load a 2-3 min video lol

[IAntDemo]

I get the same man, maybe theirs to many people watching the same vid so it becomes back sync and slow