YouTube full-screen video playback bad

You can see it well on drone videos, for example:

 

I tried with different browsers, I can't see any difference, video is smooth here.

Beautiful video, but had no problem playing in full screen.  

It does play in fullscreen-mode but isn't as SMOOTH as in windowed-mode. You can see it being slightly jerky. I have tested it on 2 different Windows 7 computers with different ATI graphics cards and the problem is present on both PCs. Again, Firefox works good. Maybe it's something that is specific to the two computers I tested on but since Firefox works fine, that means Maxthnon could too, if it was fixed.

But if no one else can duplicate your problem, it is more than likely one of your settings.  Throughout the entire video in full screen I experienced no symptoms like those you are describing.  The video playes flawlessly.

It looks like the newest Maxthon 4.9.3.1000 kind of doesn't "lock-in" the full-screen mode. When you go to full-screen mode in YouTube, the taskbar is still visible. So it seems like Maxthon doesn't enter full-screen mode properly and that is why it doesn't play smoothly.

I have uninstalled MX 4.9.3.1000 and installed the old MX 4.4.3.1000 and that version works good in full-screen.

So there is definitely a bug with this in the current 4.9.3.1000 version. Maybe this bug only appears on some computers (in my case on 2 different Windows 7 computers) but the fact is, it is a bug. I just hope they fix it since this is one bug I really can't live with.

Edited June 26, 2016 by Perplexer

Ok, on my Windows 10 machine Build 14372, and in full screen mode on You Tube, no task bar is visible.  Just make sure you move your mouse cursor out of the playing area.

OK, I think I have found out what is causing the problem.

On Windows 7 you can personalize your computer / desktop with different "Themes". There are "Aero themes" and "Basic and High Contrast Themes" available in Control Panel -> Personalization.

I personally use "Windows Classic" theme which is a part of "Basic and High Contrast Themes". In this theme (and other "Basic and High Contrast Themes") Maxthon 4.9.3.1000 does NOT work good in full-screen video playback.

But if I select any theme from "Aero Themes", then MX 4.9.3.1000 will work OK in full-screen video playback.

I don't know if Windows 10 has similar themes but in Windows 7 this is how it is. So apparently MX 4.9 series has changed something so that it doesn't work correctly with non-Aero themes in Windows 7 !

 

Edited June 26, 2016 by Perplexer

Yes, Windows 10 does have similar themes.  Here are what's available for me.