Regular Expressions (regexes) look terrifying but hey, you figured TCL out and you're capable of pulling a key from dodgy B-cam footage. Those are honestly both more terrifying.
(Weeell, yeah, this one isn't as fun as i thought it'd be, but even so wanted to put this up and link to the material so you can have a poke yourself!)
EDIT: Here's the details I promised now i've sorted out my DNS (it's always dns..) http://www.greenworm.net/2021/06/16/0...