Yeah. Irritating. I notice flickering lights on trees and the shadows @ max settings. I never really noticed til I watched your video lol. This doesn't seem to happen on player/mount shadows, mostly just tree's and large objects like aetherytes. My flying mount's shadow is perfectly fine. Also goes away when I "zoom in" the camera.

i5 4670 @ 3.4+ghz
GTX 970
16GB ram.
Windows 7 Pro.