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Probably referring to the collaboration tools. Zed has a bunch of stuff around remote pair programming with people.

I haven't seen video but it does have voice. And similarly I don't think it's screen-share, it's just editor state syncing, so live collaboration. Still quite a lot.

There is a feature that lets you share your screen. It shows up for other participants in the collaboration session as a tab in the editor.

It has a voice chat system built in as part if the collaboration tools. Personally I think they should remove the voice chat...