Hard flash cut to a light keyword card

A one-frame hard cut from the speaker to an off-white card (the detector logs it as a white flash) carrying a giant marquee keyword in outline and fill and the caption line in the middle. Dropping a full-screen word card about 0.9 s into a commentary clip (seen at 0.88 s, card held 1.5 s).

Use this transition between my clips: "Hard flash cut to a light keyword card" from the 24fps video editor library.
Preset JSON: https://24fps.dev/video-editor/transitions/flash-cut-to-light-keyword-card-e3x/preset.json (pass its "preset" to the engine).
Engine (MIT, no dependencies, ES module): https://24fps.dev/editor/engine.js. Download the engine next to your page (curl -O) rather than importing cross-origin, then import { mount } from "./engine.js" in a <script type="module"> served over http.
Wiring: root = a position:relative box at the video's size. media = { a, b }: two wrappers holding clip A and clip B, both filling the root. Clip A plays first; the cut happens at preset.at (0.88s) over preset.dur (0.12s), so start clip B at preset.at. Then const fx = mount(root, { kind: "transition", preset, media }) and call fx.render(seconds) every frame. It is seek-safe: drive it from the GSAP timeline in HyperFrames or call render(frame / fps) in Remotion. Before capturing frames, await (fx.ready ?? document.fonts.ready).
Field reference: https://24fps.dev/video-editor/llms.txt. Keep sizes as fractions of the frame height so it works at any resolution. Credit: 24fps.dev/video-editor

Same idea: Also called: Stack (AI Edit)
Technique: Hard cut to a typographic card; no whoosh or hit found in the source audio.
Footage: Man talking to camera, Pexels

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Soft bloom flashSlow warm-white glow that swells over the frame, then clears onto the next clip.FlashGlow

Cream light-leak sweep onto a black cardAbout 0.3 s after a hard cut to a black word card, a warm cream and lavender light leak sweeps in from the left and bleaches the frame, then clears to the card; the same leak returns when the card ends.Edit passLight leak