If I make one of these troublesome videos the very first one I play after launching Firefox, the odds are higher that it will play OK, but still no guarantees.
Other computers in my house have almost the same problem, except they are OK on one or two of the "problem" videos, but bad on others (which play completely OK on mine).
This all only started happening in the last month or so. Before that, these videos played perfectly every time.
I posted a youtube comment under one of these videos and one person said it played fine on his computer, but another said he had the same problem I'm having.
I guess there's nothing I can do here (since that other person has the same problem), but anyone have an idea on what's going on here? It's making me crazy.







