Mediafly may work on the WD TV Live Hub if you use their predefined feeds. But if you create a custom feed, there is nothing but problems. The feed doesn’t update, the feed shows the same Podcast episode repeated about 10 times, it does not support feeds that require authentication, and it works for a week and quits. It is broken and no one’s there to fix it. Mediafly is like the office closed, everyone left, and someone forgot to turn off the server. Nothing ever changes on Mediafly, features say coming soon for over a year, nothing is updated, the home page hasn’t ever changed, it’s just an abandon wed site.
Move to something else that allows custom RSS feeds that update properly and work with the WD HUB. As it is now RSS feeds can’t be done with the WD TV Live Hub