Comment 3 for bug 1296705

This may be helpful for figuring out the root cause of the issue. It's taken from my link #2 in this bug report. It is a way to test flash with this particular type of protected content. You can click a box on this page to open debugging information on the right-hand side of the screen, which I thought would be useful to someone who had the necessary knowledge of video encoding/flash/whatever to know what this debugging info meant and what to do about it:

test via:
http://drmtest2.adobe.com:8080/SVP/SampleVideoPlayer_FP.html

paste in this video url:
http://drmtest2.adobe.com:8080/Content/anonymous.f4v

When the test video of the train going through the tree-lined countryside works, then Amazon Instant movies work.