You can not get video from itunes to play on non-apple device due to drm license protection.
I don't think apple has DRM protection any more. I think anything downloaded after a certain date (April 2007 perhaps) can be purchased DRM free.
In regards to getting them to play, I have seen a bunch of web sites talking about a work around for removing the DRM by burning a CD with the protected music, then ripping it again. I wonder if it will work with movies.