You should be able to install it by just double clicking the DMG and drag the Strawberry folder over to "system". It's the same way similar dmg's are installed on macOS.
However we only provide experimental development builds for macOS since we don't have any developers with mac active in the project. You can download here: https://builds.strawberrymusicplayer.org/macos/

It won't show video since it's a music player.

theaudiodb.com - They require a donation of $3 each month for proper access to the API. If someone becomes a sponsor to me on GitHub I can consider it.
MusicBrainz - We already use it for automatic tag fetching, CD metadata and album covers. This is what is used when looking up CD's you load.
MusicMoz - There isn't an API as far as I can tell.
gnudb - This is a cddb service, could possibly be integrated.
opencdindex - Same as gnudb
Gracenote - This is a paid service without an open API as far as I can tell.
musopen - There isn't an API as far as I can tell. This isn't a service for metadata, but for free music.

It's not possible with Strawberry. But should be pretty easy to script using bash, just an find command with mv and some regex.
If you don't know find and regex, you can try a program called KRename: https://userbase.kde.org/KRename

You should be able to install it by just double clicking the DMG and drag the Strawberry folder over to "system". It's the same way similar dmg's are installed on macOS.
However we only provide experimental development builds for macOS since we don't have any developers with mac active in the project. You can download here: https://builds.strawberrymusicplayer.org/macos/

The only thing we have so far is the Wiki on GitHub: https://github.com/strawberrymusicplayer/strawberry/wiki
If someone wants to help with this it would be appreciated.
I was thinking of a MediaWiki site (https://www.mediawiki.org/wiki/MediaWiki) and perhaps a YouTube channel that can also help spread the word and get more active contributors and funding.
I can create the Wiki and the channel if someone volunteers to help with it.
If someone is interested in helping with it, contact me and we can discuss it.
Strawberry is a community based project with limited funding. You can become a GitHub sponsor to help fund the project.

Yes, I already started the work of adding it, basically it's identical to what's in Clementine except that Smart Playlists will be in it's own tab instead of inside collection/library. The status on that is here: https://github.com/strawberrymusicplayer/strawberry/issues/264
However we are too few contributors so I'm not likely to complete it unless we get more contributors to the project.

You can't use Strawberry to copy the files back. But if you got an old model that you can mount in Linux you can copy the music from the IPOD/iPod_Control/Music/ directory then use strawberry to organize the files back into normal directories and filenames.

We don't have Qobuz support anymore.

Bugfixes:

• Fixed height of about dialog.

Enhancements:

• Only save settings for pages that actually has been changed.
• Replaced use of deprecated Qt functionality as of 5.15.
• Made scrobbler show error dialog for all errors when show error dialog option is on.
• Dont append disc to album titles for Subsonic and Tidal.
• Sort folders added from file view.
• Changed default collection grouping to album - disc.

We use chromaprint and musicbrainz to load the tags for CD. Maybe the CD you tested is not in the database. I just tested 2 CD's by Bob Dylan here and they worked.