Why does my computer stutter when playing HD videos on YouTube?

It's either you need a faster internet connection or the computer has a hard time keeping up with flash. Flash is very intensive, and some computers have a hard time keeping up. Try and not have too many programs running at the same time. And adding more memory should help.

If you have a really old computer, and have an on-board graphics card. (meaning its just a built in chip on your computer) It might get overloaded by reading its highest peak of graphics that it can process, casuing it to read it in segments or chops

It's probably not your computer but your internet connection speed../

i have that issue sometimes too....honestly i cant tell you WHY it does it but i can tell you what i do if it starts actin up like that. you may try it..see if i helps... all i do is just reboot it. and then when u try to play the video again, it usually works great.

hope ive helped! :)

whats your video card and cpu? those are really the only 2 factors

Because you need a better INTERNET CONNECTION!!

SURE ADD MORE RAM AND A BETTER VIDEO CARD SIMPLE!