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Neil
b0dd73e7aa
App themes may set background.videoPath: a muted, looping MP4 or WebM (H.264 recommended, VP9 or AV1; one video track, no audio; <= 60 s, 8 MB, 2.3 MP) played over the required static background.path. Main checks it from container headers without decoding and serves it on the orca-plugin-image slot theme-<i>-video; images stay static-only. The renderer reveals it on its first frame, keeps the still on any failure or a decoded size past the limits, plays it only while main reports the window focused, shown and not minimized and no dialog is open, and omits it under prefers-reduced-motion. Animated WebP was measured and declined: software-decoded every frame, it cost 11-23 points of CPU vs 3-10 for the same loop as video. Implements #38363 proposed by @dohaidang.