AI video generation can fairly easily choke anything that's not NVIDIA's flagship model. Even the latest local image gen models are so large that they can be frustratingly slow with non-optimal hardware even if they fit in the VRAM. IIRC when I had an M2, it was about 4x slower at running the venerable Stable Diffusion (and SDXL) than my meager RTX 3060.

I do not do anything with AI Video, but I imagine running this locally would be a hog on a Mac - especially if not optimised for Metal.