Spotify: MusicBrainz importer
It’s now possible to import releases from a track page or open the recording in MusicBrainz/ListenBrainz if the link is present.
I’ve also added importing Spotify playlists to ListenBrainz via the ListenBrainz API. This process can be quite slow, up to 20 seconds in the cases I tested.
Existing playlists are linked instead to prevent duplicates, for identification the Spotify playlist URL is added into the description.
There is no update or sync feature, the ListenBrainz API endpoint used for the import always creates a new playlist it seems.
YouTube: MusicBrainz Importer
You can now import videos as a playlist to ListenBrainz if the description contains a tracklist. It will automatically lookup the metadata needed to add the MBID and update existing playlists if a previous import was incomplete due to missing entries in MusicBrainz. For non-matched tracks a report will be generated and opened in a new tab to search the track in Google and MusicBrainz.
You can find a few playlists I created with it on my LB profile.