Disco Diffusion is a somewhat slow AI. It makes relatively realistic images, and is somewhat customizable. Disco Diffusion requires 12GB VRAM or more, but 16GB is highly recommended. It uses CLIP models, and can use multiple at the same time. It is also very customizable. If you want to run Disco Diffusion locally, the guide is here.
If you want to use the turbo version, which speeds up animation significantly, the colab notebook is here.
Another helpful AI artist created this cheat sheet for using this AI.
Below is an example of a video created using Disco Diffusion (v5):