Apple Podcast support

[kontrollanten]

Describe the problem to be solved A lot of our users ask for listening to our videos through their podcast platform. Personally I don't have any big experience of creating or consuming podcasts, but as I understand Apple Podcast is one of the biggest consuming platforms, therefore I think adding support for Apple Podcast is a great start.

Describe the solution you would like: Create RSS feeds for channels that are compatible with Apple Podcast. What needs to be done:

• [x] Add RSS feeds for channels.
• [ ] language tag for each channel.
• [ ] itunes:image tag including channel image.
• [ ] itunes:category tag for each channel.
• [ ] itunes:explicit tag for each channel.
• [ ] link tag containing link to the channel page.

For each video:

• [ ] itunes:duration
• [ ] itunes:image
• [x] mp4 file in the enclosure tag. (#4052)

**Related isssues

• https://github.com/Chocobozzz/PeerTube/issues/4052
• https://github.com/Chocobozzz/PeerTube/issues/3761
• https://github.com/Chocobozzz/PeerTube/issues/2814

[emansom]

A better path for this would be PeerTube publishing a RSS 2.0 compatible feed, that can then be imported by Castopod.

Castopod can then take care of publishing to Apple Podcast, which it was designed for.

[dhk2]

Podcast2 plugin should be able to function as a work around until this is addressed. It checks the required boxes and is passing all the validators I can find.