anything not quoted from above, I agree with and have nothing to add~
I believe there are several stores that sell music videos, I know specifically Bugs! does (only available in Korea tho), and maybe Bandcamp in some circumstances? I’ve seen videos on Bandcamp, but haven’t gotten them in the download, so… 
(they might only be included with a purchase, not for free? I dunno…)
I believe most of these should be allowed, save for maybe video chats (tho I have added karaoke livestreams before, see the live broadcast releases for Nanashi Mumei. video chats could count as interviews in some cases?). that said, I don’t mind any of the second point here being excluded from getting releases (unless there’s no official music video for the recording, for example miComet’s version of Animal, the first example below)
I’ve added far too many of these to count, but here’s some examples selected at semi-random
- Release “アニマル” by miComet - MusicBrainz
- Release “A New Start” by Nanashi Mumei - MusicBrainz (with a teaser in the same release group, which I added while I was obsessively waiting for her first song to drop
) - Release “U WANNA LISTEN 2 SUM TUNES?!?!?!?!” by Spott - MusicBrainz
- Release “Oh Why” by Kakofonous A. Dischord - MusicBrainz
- Release “Casting A Spell” by SOUND BANDIT - MusicBrainz (including the audio download linked in the description as a second medium, which I’ve only started doing recently. done this way for the audio recording release date, since often Brony music gets released only this way, and not on other platforms)
- https://www.youtube.com/watch?v=D7olroSoGHY (haven’t added any of his videos, but I have been wanting to document The8BitDrummer’s live drum covers, just haven’t gotten around to it, mostly because there’s no release importers for YouTube yet)
I don’t know that I’d typically add these myself (it’s a lot of work to track them down), but I’d consider these to be equivalent to live bootlegs, and should be treated the same way. I’ve previously added some such releases too (both using the video title)
- Release “Caramelldansen (Live@Zinkensdamm) 4K” by Caramell - MusicBrainz
- Release “Cornerstone ’02 Full Set” by Five Iron Frenzy - MusicBrainz
also adding unofficial videos in this section
- Release “Ronald McDonald insanity” by [unknown] - MusicBrainz (an unofficial YouTube reupload from NicoNicoDouga, but it’s influential enough in the Touhou scene that I think it’s worth documenting)
- Release “This Is Halloween” by Hagaren Viper - MusicBrainz (similar story to the one above, a very popular AMV [anime music video] and one of my favorites at that. it won an award at Anime Expo 2010 too, apparently) (edit: credited to the AMV creator because that’s how it’s presented on YouTube, but that might not be the right way to handle that? I’m open to discussion on this point)
- Release “REDHEART” by 赤井はあと - MusicBrainz (an unofficial music video which received recognition and a link in the description of the original video, see the cancelled release for specific details)
I would count these too for the recording release date, but I have no idea how to best enter such releases; what status or medium type or whatnot. I’d imagine there is some sort of release event for music videos and some way they were distributed to the TV stations (at least in the days of MTV), but I’ve yet to find any details of how that worked. that said, I’ve added a few releases for these too: