Re: Good luck that
Maybe you should remove flash from your system. When I was using an older version of Firefox that could still use the Flash plugin, I had it click to activate and would see flash videos show up. When they had a newer version that no longer supported the plugin, those same sites worked without flash.
I doubt there are any major sites left that REQUIRE flash, you only see it because you still have it installed.
At least I don't see any sites that indicate they have videos that take me to the "install flash" dialog or claim Flash is required to play. Running Firefox on Linux.