I assume you're trying to run this example via the Simulator. Movie playback in the Simulator has been broken for as long as I can remember. You need to run this on an actual device to get movie playback to work.
Unfortunately, one of the recent pull requests that I brought in appears to have introduced some crashing bugs even there, and I may need to revert those changes and figure out what went wrong. Even that's not an iOS version thing, it's a particular bug with a recent code addition. I haven't had the time to dig into it and fix it, though.