I’m experiencing the exact same issue as seen in your YouTube video. I have a 2560x1440 144Hz display and both in Plasma wayland 5.27.10 and Hyprland it shows those artifacts in games where I do not exactly hit 144 fps.
I even tried the nvidia beta 550 driver but it showed the same artifacts.
I’m running endeavourOS, rtx 2070 super, 32gb ram, ryzen 5 5600x and kernel 6.7.2.