I looked into a movie listed in Amazon Instant Video. First thing I noticed is the statement that it is "Also available in HD" for select TVs. That implies it is available in non-HD. Then I scrolled down to look at the four listed download types. The HD version is for TVs only and is 2.9 GB. The portable devices version is 0.6 GB. As I stated above, I seriously doubt Amazon will allow you to DL an HD video to a Fire.