It looks like Wan2.2 For-Loop Scenario, but only 1 step. Then you can use output video as input and continuew it. At any step if you don't like something you can change and retake only 1 scene. Also you can use different step count for steps.

Wan 2.2 Single step video scenario Let-me-continue

Use this version to create a sync loop.Start from any videoEnd with specified image (frame)

wan22SingleStepVideo_letMeEnd.zip

Files with SHA256: e26d3f721d98b778c1782196aa993acb5f7e5b9d005f98d1b63a43f2b5a65c2e