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Play 2 videos in sync — side-by-side or stacked. Export combined MP4.
Play two videos in perfect sync, side by side or stacked on top of each other. Independent audio mixing, draggable split-bar, optional time offset for delay alignment, and a synchronized scrubbing timeline. Export a combined comparison video as MP4 — perfect for tutorial vs. attempt videos, original vs. edited footage, sport technique comparisons, A/B encoding tests, before/after VFX, and music covers.
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Export records the canvas in real time, then converts WebM → MP4 with ffmpeg.wasm. Allow ~1.5–2× clip duration.
