ASCII art + GLSL shaders

Hi!

I would like to start coding some animations like this:

https://twitter.com/i/status/1767859604191318235
https://www.instagram.com/p/CznnRLEI7yL/?img_index=1
https://www.instagram.com/p/C4YcE1-NaWI/?img_index=1
https://www.instagram.com/p/C4tEv5dNHah/?img_index=1

For me it is easy to convert a video into ASCII art, but it is difficult to imagine how to achieve more complex results as the ones in these videos, especially when combining them with shaders.

Any ideas, tips, tutorials pointing in this direction?

Thanks a lot!!!