The NIP is there. It's up to the apps to live up to the NIP standard and implement more of the "other stuff" for their users. Zapstream for example just added videos and shorts. Using the same nostr event as Flare.pub. Hence, those apps interoperate already. Same goes for noStrudel.

Also music (from tidal)

Where is it on amethyst?

You can look at videos on yakihonne but nobody put up any vertical videos