Kling/WAN - Generate videos from start and end frames

I would love to use Kling’s and WAN’s start and end frame generation to create videos from CivitAI.

But - imagine if we also could place video clips as start/stop instead (selecting from our generator or profile). That way video A and Video B would use last frame and first frame respectively, generate the video and stich the two together. The process could be repeated until a long enough clip has been created (say, max 5 min).