Only 'forget' seems to properly unload a movie. But I forget if we called forget on every movie after switching from them, it has been a few months since I touched the code. I'd have to do a bit of work to try and run your stuff on my iPad. I can try but my kids are getting up soon it may take a few hours. I'm running iOS 8 beta 3 but I figure iOS 7 apps should run the same on iOS 8.
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