Yes! uYouPlus is amazing although it can be a pain to install because of Apple’s shenanigans. It’s a collection of patches over the official YouTube app
"use strict"; is just a way of enabling more restrictions to make writing JS less error prone. You can find the details of what that does on MDN (or, if you don’t like long verbose technical explanations, this is a pretty good summary!)
Yes! uYouPlus is amazing although it can be a pain to install because of Apple’s shenanigans. It’s a collection of patches over the official YouTube app