Yar H265 mostly, though it also happens with h264 4k videos (Directshow off).
Tearing might be a bit off from me (not native English, sorry). It 's more like the video is skipping frames and not as smooth as 60fps, easily noticeable when the actress is moving from one side to another.
I doubt I could capture that with screenshots, but I will try.
I never use the this function in the app. Where is the screenshots folder location?