Hi there,

If you're experiencing the issue of zoomed-in YouTube videos on Firefox, you can try pressing Ctrl + 0 to reset the screen. Alternatively, you can try on full-screen, on some mobile phones this could be useful, you just need to go to your settings, display then go to the advanced options and turn on the full-screen on Firefox. Hopefully, you will resolve this issue.

Thank You, Mike Taku.

How do i click ctrl on phone? I don't have full screen option on shorts. And in full screen video it's still the same...