Playback quality seems to be very low, especially at the beginning. Why?
Typically, low quality playback only occurs during the first moments of the stream
low quality playback is the result of slow Internet connection speed. In order to comply with Mobile Data requirements of 3G access, we must first encode the movies at a super small 64kbps version which is of horrible quality.
When you start watching a movie, the Apple operating system will detect the speed of your connection, select the highest quality of playback that it can support and play the entire movie at that rate.