They play on all other devices. This is Kindle Fire 7" HD
How is the video embedded? Can you play the video from Kindle Fire when
it is not embedded in the page?
A quick Google search shows up a lot of problems on Silk with video.
Since it works on other browsers, I suspect that the Kindle is culprit here.
Meant to delete / I rewrote my code and works beautiful know across all devices even kindle