How do you get from the value on the left to the value on the right?

It's not hex to base64 or hex to base58. That's when I gave up and decided to comradesource it.

Context

PeerTube creates two URLs for each video. The original, long one looks like this:

https://tankie.tube/videos/watch/2126816c-89f5-4aab-842f-65b9f3a39c8b

And the sleeker format looks like this:

https://tankie.tube/w/faLTidGsoG1G1TPLKUFcJh

The database only stores the UUID so the shorter ID must be a function of the first.