Variable Refresh Rate (VRR) for video players

[dev-reimu]

Why is this important?

VRR would boost image clarity for high refresh rate displays. Ideally, this would trigger when in Fullscreen mode.
If the monitor refresh rate and the video frame rate don't match, the outcome will be a blurrier image. Yes, even if your monitor is 60 Hz and the video is 30 FPS.

Reality Check

Usually this isn't an issue, as most people have 60 Hz monitors and most videos are 60 FPS, but again, that's not everyone.
I doubt this feature is possible, since websites usually use Google's video player.