Prompts
Product demo video caption prompts
These prompts caption a product demo video the way we do it (phrase captions plus a label per action), then set the position, the color, and which words get…
By Sulan Zhang, co-founder of Vyra · Updated 2026-09-24
- Format
- Product demo video
- Step
- Captions
- Length
- 30-90s
- Aspect
- 9:16 or 16:9
- Platforms
- TikTok, Reels, Shorts, YouTube, LinkedIn, X
Real examples from @sulansart
More on InstagramRun them after the rough cut, once the words are final. Captions come from the transcript Vyra makes on upload, so they're timed to what you actually said.
At a glance
| Caption style | Phrase captions plus a label per action |
| Hook | The end result first, then "here's how" |
| Pacing | 2-5 seconds per action, no waiting |
| Aspect | 9:16 or 16:9 |
Prompt it in Vyra
Minimal:
Add captions to my product demo video.
Standard:
Add captions to my product demo video. Style: phrase captions plus a label per action. Bold white sans-serif with a thin black outline, placed above the TikTok buttons at the bottom. No pop or bounce animation.
Full:
Add captions to my product demo video. Style: phrase captions plus a label per action. Bold white sans-serif with a thin black outline, placed above the TikTok buttons at the bottom. No pop or bounce animation. Make my first line a bigger caption on its own. Change captions at the pace of the edit (2-5 seconds per action, no waiting). Spell these exactly as written: [names, brands, places]. Keep text out of the middle of the frame, where the subject is.
Why these settings
- The caption style is the one from our product demo video page. Naming it in the prompt is faster than fixing it afterwards.
- On TikTok, the bottom of the screen is covered by the post caption, username, and buttons, so captions sit above it.
- One bigger caption is enough. If every line is big, none of them stand out.
- The first line on this format is usually something like "here's how". That's the one to make bigger.
Fixes
- Captions over your face. "Move captions to the lower third."
- Wrong word. "At 0:12 the caption should say [word]."
- Too many words on screen. "Max 3 words per caption."
- Style doesn't match what you had in mind. Attach a video you like and say "match the captions in this".
FAQ
What caption style fits a product demo video? Phrase captions plus a label per action. To copy a style from another video, attach it and say "match the captions in this".
Can it spell names right? Yes, if you list them. "Spell these as Vyra, sulansart, gesso."