When I call "iPhoneUtils.PlayMovie()" after detecting a marker, and playing the video successfully. The app will show a still of any objects attached to the marker on a blank background and hang for a few seconds (about 5-10 I estimate) before starting up back to normal.
I used the provided script "TrackableEventHandler.cs" and basically appended "iPhoneUtils.PlayMovie()" as the last line in OnTrackingFound().
Looking at the output in Xcode, It seems to be stopping QCAR when the video launches but not reinitialising it straight after the video ends.
Hope Ive explained my problem well enough, I tend to waffle hehe.