I created a simple media playback and storage test for anyone who is considering using a CDN for Roku channels. Use the link below to add this private channel to you Roku media player.
channel access code:cdntest
Note: upLynk is using Amazon Web Services, which would make two instances of Amazon in the test. I included them in the roundup because of the simple and easy way to obtain mp4 urls and for the quality of their encoders. I would definitely consider upLynk as a way to deliver your content. (upLynk is not paying me to say this!)