Prompts

Product demo video rough cut prompts

These prompts cut raw footage into a product demo video (30-90s, 5 beats in order), with the pacing and the usual mistakes written in.

By Sulan Zhang, co-founder of Vyra · Updated 2026-09-24

Format: Product demo video
Step: Rough cut
Length: 30-90s
Aspect: 9:16 or 16:9
Platforms: TikTok, Reels, Shorts, YouTube, LinkedIn, X

Real examples from @sulansart

At a glance


Target length	30-90s
Beat order	0-3s: the finished result; 3-8s: what we're going to do; 8-60s: the task, action by action, labeled; 60-75s: the result again, with how long it took; 75-85s: where to try it
Pacing	2-5 seconds per action, no waiting
Hook	The end result first, then "here's how"
Avoid	Every menu; Features instead of the task; Tiny UI in a vertical frame

Prompt it in Vyra

Minimal:

Make a 90-second product demo video from these clips. Best takes only.

Standard:

Cut my clips into a 90-second product demo video for TikTok. Follow this order.
- 0-3s: the finished result
- 3-8s: what we're going to do
- 8-60s: the task, action by action, labeled
- 60-75s: the result again, with how long it took
- 75-85s: where to try it
Pacing: 2-5 seconds per action, no waiting.
Keep the strongest clip or take for each part and cut the rest. No captions or music yet.

Full:

Cut my clips into a 90-second product demo video for TikTok. Follow this order.
- 0-3s: the finished result
- 3-8s: what we're going to do
- 8-60s: the task, action by action, labeled
- 60-75s: the result again, with how long it took
- 75-85s: where to try it
Pacing: 2-5 seconds per action, no waiting.
Keep the strongest clip or take for each part and cut the rest. No captions or music yet.
Open with this. The end result first, then "here's how"
Avoid these. Every menu. Features instead of the task. Tiny UI in a vertical frame.
Export 9:16. When you're done, list what you cut with timestamps so I can check.

Why these settings

A numbered beat list gives the agent an order to follow. Leave it out and it picks one for you.
Product demo videos usually run 30-90s on TikTok, Reels, Shorts, YouTube, LinkedIn, and X.
The pacing line (2-5 seconds per action, no waiting) sets how long each clip stays on screen.
The full prompt names the common mistakes up front, so you're less likely to see them in the first cut.
Asking for a list of cuts with timestamps makes the first pass quick to check.

Fixes

Too long. "Cut it to 70 seconds. Drop the weakest part first."
Parts out of order. "Follow the order from my first message exactly."
Wrong clip in a part. "For the 3-8s part, show me other clips I could use, with timestamps."
Something you wanted got cut. "Put back the part where [describe it]." It can find the moment from a description.

FAQ

How long should a product demo video be? Short versions run 30-90s. Put the number in the first sentence of the prompt so the cut is built around it.

Do I need to trim my clips before uploading? No. Upload the raw clips. Vyra transcribes and describes every scene on upload, so it can find the part that fits each beat.