The Peterson Museum (basically the Louvre of automobiles) did the same -or very close- with wonderful video tours of areas that only paying 150$ would get you to see (The Vault).
https://www.youtube.com/user/PetersenMuseum/videos
The Seattle flight museum also started a series where the main curator would talk about individual planes in long format, way better experience than looking at photos online.
https://www.youtube.com/channel/UCda1wjNf7JaYgx9ukXRqgIQ
Those are just the ones I noticed as an Aviation and Automobile enthusiast. If anyone knows others please share ;_;
Thanks for the links, absolutely great channels. I wonder if there exist something like curated "awesome list" of museums online? Because I don't even think it's possible to find these gems just doing a search on Google/YouTube which returns mostly low quality to spam results.
Maybe we can start an HN or Reddit thread and then link it from AwesomeMuseamsOnline.(whatever cheap tld)