As I mentioned, I rip my amazon purchases. However, I also use google play for some things and they only allow streaming of video. I am hoping that they youtube api develops enough to allow us to use the youtube interface to watch google play videos. They already playback in you tube, but they wont play in MC because of the DRM.
Anyway, for streaming video, I am have programmed my remote to send the appropriate keystrokes to the browser for play/pause, fast forward, rewind, and full screen. I still need the keyboard to select the video, but once it is running, I can use the remote for pause, etc. Also, for anything that I own/ want to add to my list of movies, I create a batch file that calls that website. I add the batch file to MC and tag it as a movie. I can download cover art, etc, but when I select it to play, the batch file minimizes MC, runs my browser, and navigates to the correct page. At that point, I can use the programmed keys to go full screen, etc. The batch file is only really useful for streams that you want to add to you library.
Alex