My friend Barak Sh says:
… probably around 99.9% of the world’s population already knows that you should “press ESC to exit full screen mode” in YouTube. Isn’t it time to stop showing this extremely annoying message?
I would probably disagree and say that assuming such a thing about 99.9% is too bold, but…
I’m teaching my father (62) to use the Internet. I had to explain him many times what is spam, what are tabs in the browser, what are links, how to write a subject in an email and how to save email attachments to a local folder. Very simple things, but he’s still not so sure about most of them.
But he immediately understood that pressing ESC exits full-screen mode in YouTube! And he applied this knowledge to sport5.co.il (nonstandard).
So he’s probably not too far off the mark.