I would love to see a video in your channel on how to build a hotkey USB foot pedal similar to the MSI Liberator GP10 or the Elgato foot pedal.
I think the layout of the keys is better in the MSI one, but either way, I would love to see what you would come up with function and design-wise.
The electronics of this are relatively simple, the hardware not so much so as it has to withstand a lot of potential abuse. This may be why no one has suggested anything yet. If we can get a pre-made (multi-function) pedal then that's definitely dooable but current 3D FDM printing isn't capable of the sort of strength required. Even with nylon I would imagine. Metal printing is possible (JLC and others do it) but it doesn't come cheap.
Take everything I say with a pinch of salt, I might be wrong and it's a very *expensive* way to learn!