hii please help

for a while now my game has been alright, its fun I managed to download some mods too. the only problem is whenever I move or my screen moves there would be a grainy or sharp texture, and it really irks me and kinda irritates my eyes. heres a video (this also happens to my unmodded saves as well)

https://reddit.com/link/1q6ht6g/video/jrd02jwk0ybg1/player