Explosive Keywords C07
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Previews are illustrative demonstrations of the technique — not your footage. Your real edit is produced later by Claude Code.
C07 · Captions · intermediate · 5–90s
A regular caption line runs until a key word bursts out of it, filling the frame at several times its size for a beat before snapping back.
Most of the dialogue runs as a compact, quiet caption line. When a chosen keyword is spoken, it leaves the line and becomes an independent visual event: it scales to several times its size in the accent colour, with optional burst lines and a brief dim of the footage, then returns to its slot. Used sparingly, it turns the one word that matters into a moment the viewer remembers.
Try the parameters
Best used for
- — Hype and announcement videos
- — Results and milestones
- — Sales-led reels
- — Energetic tips
Assets
- ● Source video required
- ○ Transcript with timing optional
- ○ Sound effects optional
- ○ Brand fonts optional
Pairs well with
If assets are missing
Without word timing, explosions cannot land on the word — transcribe locally first. If no clear keywords exist, ask the user which words matter rather than exploding filler.
Accessibility
Large sudden scale changes can be uncomfortable: limit frequency (≤ 1 per 4s), keep burst lines short, and never flash the full frame. Keywords remain in the caption line for screen-reader transcripts.
Individual prompt
updates with the parameters above# CES style instruction — C07 Explosive Keywords
You are an experienced motion designer and video editor working in Claude Code. Apply the **C07 Explosive Keywords** technique to the supplied footage as specified below.
**B. Project configuration:** 1080×1920, 9:16, 30 fps · Source video: not provided — ask the user for the path before starting · Video language (on-screen text & captions): English
**Captions** — Most of the dialogue runs as a compact, quiet caption line. When a chosen keyword is spoken, it leaves the line and becomes an independent visual event: it scales to several times its size in the accent colour, with optional burst lines and a brief dim of the footage, then returns to its slot. Used sparingly, it turns the one word that matters into a moment the viewer remembers.
### C07 Explosive Keywords
- **When:** Applies to the whole video
- **Layer / track:** Captions layer (topmost text)
- **What it does:** A regular caption line runs until a key word bursts out of it, filling the frame at several times its size for a beat before snapping back.
- **Parameters:** Keywords: (not set); Keyword scale: 3.2x; Keyword hold: 0.6 s; Max keywords per sentence: 1; Burst lines: on; Dim footage on keyword: on; Accent colour: #D7FF5F; Caption typeface: Bold sans (Space Grotesk / Inter Black)
- **Steps:**
1. Add an explosive-keyword caption layer across every spoken section of the video on the top track (1080×1920 @ 30fps).
2. Timing source: use the supplied transcript's word-level timestamps for the English dialogue. If it only has line/sentence timing, or no transcript was supplied, transcribe the source audio locally with Whisper word timestamps (e.g. `whisper source.mp4 --word_timestamps True --output_format json`, or WhisperX for tighter forced alignment) and save the result as captions.json. Caption text is the speaker's words verbatim — never paraphrase, "correct", summarise or invent wording; list any low-confidence words for the user to confirm.
3. Keywords: pick at most 1 per sentence from the transcript — the result, number or verb the sentence hinges on, as spoken. Never insert words that weren't said; aim for no more than one explosion every 4–5 seconds.
4. Base captions: one line of ≤ 24 characters in Space Grotesk at Black/ExtraBold weight (fallback: Inter Black), cap height ≈ 5% of frame width, #F4F2EB, anchored per the safe zone (bottom edge 20% above the frame bottom on 9:16).
5. Explosion: on the keyword's start frame, hide it in the line and spawn a copy that scales from 1x to 3.2x (capped so it fits 90% of frame width) while travelling to the frame's optical center over 6 frames with a fast expo-out curve (cubic-bezier(0.16, 1, 0.3, 1)), rotated −4°, in #D7FF5F. Hold 18 frames, then return to its slot over 5 frames. Add 10–12 radial burst lines (accent, 0.6% width stroke) that shoot outward and fade within 8 frames. Dim the footage to 65% brightness for the hold, easing back over 6 frames.
6. Keep the speaker's eyes uncovered: if the centered keyword would overlap the face, place it in the upper third instead.
7. Implement as a Remotion <ExplosiveKeywords /> component reading captions.json plus a keywords list; the explosion is a separate absolutely-positioned layer sequenced with <Sequence from={keywordStartFrame}>.
- **Assets:** Source video (⚠ MISSING) · optional: Transcript with timing, Sound effects, Brand fonts
- **Fallback:** Without word timing, explosions cannot land on the word — transcribe locally first. If no clear keywords exist, ask the user which words matter rather than exploding filler.
**G. Asset integrity and restrictions:**
- Do not create or present invented testimonials, comments, quotes, reviews or endorsements.
- Do not fabricate numbers, metrics, charts or results. Data visualisations use only the supplied data.
- Do not create fake screenshots or UI and present them as real. Illustrative graphics must be clearly illustrative.
- Do not attempt unsupported 3D reconstructions or perfect subject separation without a mask; use the documented 2D fallbacks instead.
**I. Quality verification:**
- Check output dimensions and aspect ratio with ffprobe — they must match the configuration exactly.
- Check the output frame rate and that the duration is within ±0.5 s of the target.
- Check audio/video synchronisation at the start, middle and end (lip-sync and SFX hits within 1 frame).
- Inspect frames at every beat boundary for text clipping, overflow and safe-zone violations.
- Confirm the output file exists and plays — never claim a render is complete without an actual output file.
- Report any missing asset or unimplemented effect explicitly.
More captions styles
Choose one primary caption style per video. It usually runs across all spoken sections as a global layer.
- C01Karaoke FollowShort caption pages sit over the speaker and each word fills with the accent colour at the exact moment it is spoken.
- C02Pop Word CaptionsOne to three words at a time pop onto the speaker's chest with a small scale overshoot and a short upward drift, then hand off to the next.
- C03Typewriter SubtitlesEach subtitle types itself on character by character with a blinking caret, paced so the phrase completes as the speaker finishes it.
- C04Highlight SweepFull caption lines stay steady while an accent-coloured block sweeps in behind one key word per line exactly as it is spoken.
- C05Stacked CaptionsEach phrase is set as a tight stack of two or three short lines that rise into view one after another, the key line set larger.
- C06Editorial Lower ThirdsCalm sentence-case subtitles sit low-left in a refined typeface under a thin accent rule, crossfading softly between sentences.
- C08Subtitle CapsulesEach short phrase appears inside a rounded label capsule that stretches, pops or slides to fit the next phrase as the speaker talks.
- C09Monospace Terminal CaptionsDialogue prints word by word in a monospace terminal block with a prompt and blinking cursor, older lines scrolling up and dimming.
- C10Bilingual Caption FlowA bold primary caption in the spoken language is paired with a smaller, differently coloured translation line, both kept inside the safe zone.