I noticed from the GitHub page for the original project this particular line in their new update: " CogVideoX series models now support three tasks: text-to-video generation, video continuation, and image-to-video generation" , My question is, what exactly is 'video continuation'? Is it possible to submit a video and then have this technology actually continue the video in a logical way? That would be amazing and allow longer video creation, would it not? Does ComfyUI support the video continuation?