Podcast not streaming

I can't be of much help, though I can confirm the behaviour. The media file is hosted on Google Drive. It has a URL beginning with http but this redirects to the https version of the same file - the Store used not to handle https (secure connection) though it seems to be able to more recently - so this shouldn't be a problem though I would regard the use of https as inadvisable. The file isn't forcing a download (a common problem) so I can see no other reason for it failing to stream unless the server itself is not responding properly to requests from the Store. It's quite possible that Google Drive is set up to offer downloads but not streaming - you would have to take that up with them (or find a more suitable server).

As to the itunes:duration tag it's not absolutely essential but it is advisable to have it as otherwise the Store won't know how long the file is and the duration will only appear in the iTunes application when subscribing once the the file has been downloaded. I'm surprised that Feedburner doesn't offer this - you do have Smartcast enabled? - however you have actually constructed the feed in Wordpress: I would have thought that ought to allow for this tag, but I can't advise on it. They have a Help page which may... help.

https://en.support.wordpress.com/audio/podcasting/

Matt,

Unsure what you did, but when I click on your podcast episode, it plays immediately. You fixed it!

It looks like you are hosting your content at Archive.org. Did you move your content after Roger noted you are using Google Drive?

-Fan