as I move through the world, chunks flicker, disappear, and i can see down into caves. I have enclosed a video with as much information as possible, including a couple of the F3 screens. (Please note it doesnt seem to matter what kind of video options I use, the issue persists.)

You can view it here: https://www.dropbox.com/s/oiz3io308r7al7r/Minecraft%20Graphics%20Error.mp4?dl=0