Dissolve the room into a flat colour field behind the speaker

A 0.25 s tinted dissolve swaps the real room for a flat royal-blue field with small icon shapes and faint outline words, keeping the cut-out speaker in place; the reverse dissolve takes about 0.3 s. Highlighting a stretch of 1.5-2 s of speech as a stylised section (seen 3.35-3.55 s in, 5.3-5.6 s out).

Use this transition between my clips: "Dissolve the room into a flat colour field behind the speaker" from the 24fps video editor library.
Preset JSON: https://24fps.dev/video-editor/transitions/colour-field-background-swap-dissolve-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 (2s) over preset.dur (0.25s), 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)
Footage: Man talking to camera, Pexels

Similar transitions

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

Hard cut to a black word card, caption carries overZero-frame hard cut from the speaker to pure black while the running caption keeps its position and style, turning the next few words into a title card.Edit passCut

Orange film-burn flash into a word cardAn orange to yellow film-burn leak with a bright vertical streak floods the frame for about 0.3 s and drops out to a black card with a giant ghost word behind a small red caption.Edit passFilm burn

Prismatic white leak flash over a continuing shotA white lens-flare with rainbow fringes blooms over the moving footage for 0.3 s (peak at +0.08 s, brightness 205 to 237) while the speaker keeps talking; there is no jump in the picture.Edit passFlash