Build a click-through UGC video ad maker in n8n

Goal: Let a non-technical person make a UGC-style video ad by clicking through forms.
Setup: agents used in source: n8n; tools/MCPs stated: n8n Forms.
Steps:
1. Build one n8n workflow driven entirely by Form pages, so the user only opens one form URL.
2. Ask for counts first (products, intro yes/no) so the next page shows exactly that many fields.
3. Generate options at each step (4 presenters, 4 voice previews, product views, scenes) and show a "use / re-roll with a note" page before anything is paid for.
4. Film one clip per product with several takes; let the user pick the best take per clip.
5. Upscale the picked takes and join them into a 1080p MP4.
6. Carry state in one $json.state object through every node so a re-roll keeps earlier choices.
Rules: ask me before anything irreversible (sending, posting, paying, deleting); don’t invent data, results or tools I haven’t given you; tell me what you couldn’t verify.
Based on: /u/useapi_net — https://www.reddit.com/r/n8n/comments/1wx2q9k/i_built_a_multipage_n8n_form_app_that_makes_ugc/

Steps are from the source. Includes a “Based on” credit line.