We’re using iPhoneUtils.PlayMovie() extensively for cutscenes and our game crashes least once per playthrough - and always at the beginning or end of a movie. No errors/crashes in the editor, only on the device.
Anyone ever experience anything like that? Any ideas?
What does stack say?
Actually you could check out Troubleshooting section in Unity manual to figure out how to debug games in Xcode.
that’s what I’ve been doing all day since. might be a memory problem. I figured that might be the case since it crashed sooner with Instruments running… 
I’ve been trying to reduce the amount of stuff that’s in memory all the time and it seems to be getting better. Have to test some more though…
may be try compiling a Debug build?
maybe try different iPhone supported video compression.
i had less video problems exporting video from Quicktime 7----> Export Movie to iPhone (.m4v)