help with streaming workout from youtube???

OK. I'm not trying to be cheap, but I started doing insanity from workout sites or youtube on the web. Sometimes its wonderful and plays straight through, but today...another story! A 45 min workout was 75 min, and I still had 10 min of the workout to go. Is there any trick to getting it to not time out? We do have DSL and most times I'm doing the workout when no one is on any other device surfing the web.

Thanks in advance...

Michelle