I wonder what percentage of views are done with a general purpose web browser vs. YouTube apps on phones and TVs. Otherwise, yeah, if you have a web browser it is an option. And since this thread is about browser extensions, I too am wondering what they meant.

Most people don't even know what Invidious is, let alone the fact that there are other video hosting sites that aren't youtube (Vimeo, for one).

Invidious is always breaking, too, and most people will stop using it when that happens.

We are talking about most people, not the absolutely tiny minority of technical users who are aware that such a thing as Invidious even exists.

You see how often growing youtubers complain about more than 85% of their viewers are not subscribed to the channel, or how just some videos have more views than their main content? The issue is that Invidious doesn't have the algorithm Youtube provides to everyone, and that not a lot of people really watch their subscribed page.