The video is titled V2.1 Blender 3.0 enabling and installing add-ons, but these steps apply to ANY current version of Blender, don’t be put off by the low version number. Putting this post in my SideEye column.
Goon (Goonther Blackcinder) is a #SecondLife resident who teaches at #BlenderSchool inworld at (SLURL) GoodVibes
There’s an active Discord group – there’s an invite link in the school landing area. You can support his work on Patreon at this link.