Prompts
Reaction video caption prompts
These prompts caption a reaction video the way we do it (captions on your speech only), then set the position, the color, and which words get bigger.
By Sulan Zhang, co-founder of Vyra · Updated 2026-09-24
- Format
- Reaction video
- Step
- Captions
- Length
- 30-90s short, 8-20 min long
- Aspect
- 9:16 or 16:9
- Platforms
- TikTok, Reels, Shorts, YouTube
Run 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 | Captions on your speech only |
| Hook | Your biggest reaction first, then rewind to the start |
| Pacing | Clip plays, pause, react, resume |
| Aspect | 9:16 or 16:9 |
Prompt it in Vyra
Minimal:
Add captions to my reaction video.
Standard:
Add captions to my reaction video. Style: captions on your speech only. 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 reaction video. Style: captions on your speech only. 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 (clip plays, pause, react, resume). 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 reaction 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.
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 reaction video? Captions on your speech only. 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."