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When I open a movie in preview (tested with .mov and .wmv), and I go to full screen, the movie turns black after five seconds, unless I keep moving the mouse. The movie plays just fine in windowed mode, and the issue occurs both on external and internal monitor, and with Caffeine turned on or off.

I assume there's a timeout setting somewhere. How can I modify this so that I can watch an entire movie in preview?

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up vote 1 down vote accepted

It turns out this is a known bug with Pathfinder that doesn't interact well (yet) with Quick Look. As a workaround, you can use Quick Look from Finder.

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