For some time now, I’ve noticed a difference in the video quality when using different browsers. Today I figured out the reason why and the solution.
The problem is Internet Explorer, more specific the hardware acceleration feature in Internet Explorer 9 and later versions that lets Internet Explorer move all graphics and text rendering from the CPU to the Graphics Processing Unit (GPU). For more info: https://support.microsoft.com/en-us/kb/2528233.
The trick is to turn this off, see the screen shot below.