edit: it works! but can break youtube at times.

Works great on computer but doesn't function at all on mobile

It just works.

There hasn't been a public API for pulling official numbers for years now. These apps just invent fake numbers based on extrapolations from the tiny minority of people that install the apps, which self-selects for a sad, dislike-obsessed population of people, skewing the numbers more negative than they actually are.

Youtube is basically useless without this extension