Uniform Analog Noise 

Play this at the maximum resolution you can. It will lower the impact of youtube's compression.
You can download a clean version without youtube compression here: redjard.org/pastebin/analog_n...
This is 3D opensimplex noise, filtered to follow a uniform distribution (without that the video would look largely grey-ish).
Each color-channel is taken from a separate noise-seed.
The video slowly scrolls up in z-direction.
For details on the filtering, read this: lemmy.dbzer0.com/post/22377511
If you are feeling adventurous, here is the initial 36GiB(!) 8k video that I rendered: redjard.org/pastebin/analog_n...