Well, Apple got back to me, they are not having an issue downloading the episodes in their test environment. Go figure.
I duplicated the issue on my own personal iPad. Interestingly, it first worked (I was running iOS 8.4.1). I proceeded to try again after updating to 9.2.1 and the error happened.
I then created a copy of your podcast feed, changed the media URLs to another CDN (we have multiple CDNs at our disposal) to rule out the possibility that there was a problem with our CDN. My test succeeded, I was able to download the files which then lead me to believe we're having a technical issue with our CDN.
I then proceeded to spend the next 2 hours testing our CDN. I did everything right down to replicating the user agent. I could not explain why the file download failed.
Out of frustration, I manually subscribed directly to your feed at
http://www.voicemarketingradio.com/vmr/feed/podcast which lead to good news, it worked as well. This now ruled out that our CDN is the problem.
This lead me to revisit your original suspicion that the problem was a feed issue (not media hosting). I looked up your podcast on iTunes and quickly found that you are NOT using (
http://www.voicemarketingradio.com/vmr/feed/podcast) as your podcast feed, you are using (
http://feeds.feedburner.com/ebayradioshow).
I then manually subscribed to your podcast on my iPad using the FeedBurner feed (
http://feeds.feedburner.com/ebayradioshow), where I confirmed, downloads fail.
I did compare the FeedBurner feed to the PowerPress feed briefly, one thing I noticed is that the FeedBurner feed is including <media:content> tags in addition to the enclosure tags. I don't believe this would be causing the issue but who knows. What I do know from my testing is the problem has to do with FeedBurner.
My advice would be to go into FeedBurner and disable any of the enhancement features and added options, then refresh your feed to see if that clears up the issue. Ideally you want FeedBurner to simply cache your actual feed without modification. The second option is to leave FeedBurner completely. Here are the instructions if you decide to leave FeedBurner:
http://create.blubrry.com/manual/syndicating-your-podcast-rss-feeds/leaving-feedburner/