I would recommend going to the Samsung development team to clarify what the widget limits are for file size and codec allowances. Unfortunately, I'm unable to help in this situation.
Our company developing some widget for Samsung TV. We have problems with streaming big video files.
I'm trying to play big video file near 400Mb MP4/H.264/AAC
I hardcoded URL into Yahoo! VideoSample widget and uploaded it on my Samsung LN40B650, but always got error while playing that file. Seems like video is loaded properly, but player dispatch onStateChange() where event.payload.newState == event.payload.videoplayer.states.ERROR.
Also I tried to play 2 different MP4 video clips on my Samsung TV which were downloaded from YouTube . The one, which is 32Mb size plays well. It's 640x480 MP4/H.264/AAC
But the one which is 56Mb starts playing and than player throws out an error described above. Both files are identical except size.
So, seems its related to Samsung internal video player.