> What is the deal with the video stopping after only 1/4 of the way through?
Probably network problems. Could be anywhere between you and the source of the stream.
Sometimes, clicking on the little cog-icon in a YouTube window and selecting a different resolution will result in a better experience.
> I just used the quicktime player and had absolutely NO problems. So,
> stay with QuickTime?
Maybe. QuickTime does a lot of caching.