Apologies for the very naive problem. I've just upgraded to max 5 in order to use Jitter for a presentation. My needs are simple but I'm struggling. Basically I want to be able to trigger some full screen QT video (HD) from inside my patch on a projector connected to my lap-top. I've done the tutorials with the demo movie okay but when I try to load a video file of any size (a few minutes of 1080 video, e.g), the computer freezes. I'm confused by the help files for jit.qt.movie/ jit.window's reference to 'loading the movie into RAM' - it is streaming from the disk rather loading the whole thing into RAM, right? I was anticipating jitter having some kind of equivalent to both groove~ and sfplay~ objects and obviously I need the video equivalent to the latter. Any suggestions appreciated.