Mobile YouTube no longer works on IE11, but Invidious website does work on IE11.
Since YouTube no longer supports IE11 anymore completely since early 2022 (even the UI functionally breaks since April 2022 and videos have become unwatchable since May 2023), but when you access the mobile version, it will just show an almost-blank like page, so Invidious was the winner.
If you plan on watching YouTube on IE11 in 2024 (which was over 10 years old), you can just use Invidious instead. Maybe i can try it on IE9 next time.
