(Windows only warning, unless someone wants to add Linux support)
I didn't really search around for GUIs way back, but ended up making a basic GUI because I wanted to learn programming.
With just having options as checkboxes for YouTube-dl. It has served me well all these years. It was literally the thing I made while learning programming so the code is pretty janky when I look back at it though...
It's a link to an image on github not sure why it doesn't work for you. Try just looking at the repo then:
https://github.com/Thomasedv/Grabber