Diffusion Video Editing

Pause a video at any moment, describe what should change, and the rest is regenerated from that point on. The footage before the pause is untouched, real, pixel for pixel — only what comes after is invented, so it has to match the lighting, the faces and the camera exactly.
One source, paused at two different moments, each continuing a different way. Press play on a branch to watch the original play up to its pause point and carry straight on into the edit.
The red segment is generated. Everything before it is the untouched original.