Comment 22 for bug 151674

perhaps we (people affected by this bug) should test the work around suggested in:
http://www.nvnews.net/vbulletin/showpost.php?p=1724807&postcount=16

The poster there says to use OpenGL for everything, with a specific combination of settings...

I will try this out when I get home tonight and report if I have non-tearing videos.. if it's the case, perhaps this can be the default configuration for Nvidia cards at least (not sure how widespread this issue is)