Red and cyan split

Cyan on the left, red on the right, high contrast, like opposing coloured gels. Tension, thriller and stylised portrait moments.

Apply this to my video: "Red and cyan split" from the 24fps video editor library.
Preset JSON: https://24fps.dev/video-editor/effects/red-cyan-split-ca/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 = { main }: main is a wrapper holding my video, filling the root. Then const fx = mount(root, { kind: "effect", 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: Fiery Cold / Cyan Red / Midnight Star / Holy Night, Fiery Cold, Midnight Star, Holy Night, Cyan Red
Technique: Recreated from a popular video editor's filters panel
Footage: Man talking to camera, Pexels

Similar effects & grades

Neon cyan outline on dimmed backgroundCut-out person rimmed with a thin cyan line and a pulsing cyan glow while the footage behind is dimmed almost to black.NeonOutlineCut-out

Thick white sticker outlineA chunky solid white border hugs the cut-out person with a soft drop shadow, like a die-cut sticker.OutlineStickerCut-out

Thin white line outlineA fine, even white line traced around the cut-out person with no glow.OutlineThinCut-out

Magenta aura, slow pulseSoft magenta glow breathing around the cut-out person against a slightly dimmed background.AuraGlowCut-out