> If you don’t even see the difference between 1080p and 720p, there’s something else going on.

If I open a browser window and click on a YT video suggested on the main page, it plays on small portion of the screen of my 14" MacBook: there is little practical visual difference between 720 and 1080 at that 'video box' size.

If I open the same video on my 27" 5K iMac and full screen it there, then yes, there is a difference between 720 and 1080 (and 4K) there.

But I find 60fps does not improve the content / experience in any situation.