Having a Problem With My Internet Speed

I just moved yesterday to my new placeanyway, guy comes today - hooks up the high speed, same setup, same service same ISP. So i go and set up the internet here today and it seems to be running just as well, if not better than before. The pages are loading just as fast, speed test sites are giving me an average of about 5.5 mbps +, its all good and fast. my problem is that when im watching a youtube video online, even after its fully buffered - it keeps just quickly freezing off and on, lagging if you will. every few seconds it will lag.so the speed is obviously there, but im wondering what other problems it could be. packet loss, some sort of inconsistency?thanks in advance, i really wanna fix this.Having a Problem With My Internet Speed
it just seems to be a problem streaming video,i went on another youtube like site, this one isnt lagging - but its refusing to buffer all the waylike the buffer line will go a certain amount, and then once the play line catches up to it, it will lag quickly and then the buffer bar will jump ahead.its like its only buffering it part by part once i get to it.ughhh, maybe its a flash player problem