ComfyUI is the free, node-based engine most of the open-source AI video and image scene runs on. Comfy MCP lets an AI agent like Claude run those workflows from chat: connect it once, then ask the agent to generate images, video, audio or 3D and pull the files back. It is in open beta, so you can automate ComfyUI without wiring nodes by hand or babysitting a local GPU.
NotebookLM, Google's research-notebook tool, can now turn the documents you upload into short vertical videos, the kind that fit TikTok, Reels and Shorts. It is free, works on mobile, and is built for repackaging something you have already written into short-form video without editing it yourself. It is a fast way to spin up an explainer clip, though you give up fine control over how the finished video looks.
FLUX.2 Klein is an open image model that struggles to keep a character consistent from one shot to the next. RefControl is a family of free add-on LoRAs that lock a reference image to a control map (depth, pose, outline) so the face and style hold while you change the pose. That is the consistency you need for video reference frames. It is community-made, so quality varies by control type.