Originally Posted by Vicpdx192
oh ok so I should expect extra data usage correct?
No, it doesn't count against your data for the video itself. It's only sending minuscule information to Comcast to let the system know to start a video, pause it, etc.
I think the previews go over the internet. The video is like watching any other tuned channel. If you pause it for a few minutes, Comcast will release the tuner (to allow someone else to use it) and you'll have to go to the main XOD menu and choose your video under the "saved on demand" folder. You can pick up where you left off there.
If your internet goes out while watching a show, you'll be unable to pause, rewind, etc. but the show will keep playing. I found this out while working on my router while the wife was watching a show.