Embed random vid from the channel

[mr-islam]

Prior art: This extension: https://github.com/NikkelM/Random-YouTube-Video
They're doing something complex with a server ... since the aim here is one channel only, we can do it static? Or hardcode some stuff.

[mr-islam]

Waiting for a fuller release of vidstack (https://github.com/vidstack/player), maybe a few weeks or months till YT support. don't want to use anything less modern and end up having to migrate later