Commander Kinsey wrote:
Oh, Youtube changed to HTML5 4 years ago :-)
Surprising as I didn't think all browsers took up HTML5 for quite a while.

So how come a big company like Adobe made such a piece of crap, and didn't fix it?

They didn't make it, they bought it. I guess in the end it was too hard to
maintain and required a specific install for every os. Just like java which
is all also dying. HTML 5 is os agnostic by default. IOS not supporting it
was the killer blow.
https://en.m.wikipedia.org/wiki/Adobe_Flash