Vector Quantized Diffusion Model for Text-to-Image Synthesis
Text-to-Image Generation

text_to_video_zero
Text2Video-Zero: Text-to-Image Diffusion Models are Zero-Shot Video Generators
Text-to-Video Generation

Note: Pipelines are simple examples of how to play around with the diffusion systems as described in the corresponding papers. 
However, most of them can be adapted to use different scheduler components or even different model components