Videos are really slow and choppy on my virtual machine?

Everything else, including this site, seems to be working perfectly. In fact, I am even posting this from my virtual machine. However, whenever I try to play a video, it plays very slow and sometimes the picture is out of sync with the audio. How do I fix this?
Answers

New World Man

Is that also through VM? If so look through the settings, and see about increasing the Video memory (useually the default is quite low)..