McLarry.

Last night and today, I had a couple of instances where a video would start to play, then just stop. What I did to resolve it is to remove the Adobe Flash Plugin and the Adobe Flash player. Then went back and re-installed them. My problem seems to have been resolved.

If you're finding that the Guitar Tricks player is still having issues, you can always download Adobe's Media Player. I've used it in the past and works great.