Youtube (html5) in fullscreen mode is choppy/jitters/flashes. installed add-on "youtube flash-html5", clicked "flash player" option and full screen works great. But when in flash mode, the control bar (play/volume,etc) is super tiny. Enabling or disabling hardware acceleration does nothing. Driver and flash up to date. Is there any fix to this? I don't have this problem with the Edge browser. not sure if any of this helps: Windows 10 Intel HD graphics 520 Intel Core i7-6500U CPU @2.50GHz 2.60GHz 64-bit