YouTube Premiere

Set the date in the upload flow and YouTube builds the watch page straight away, so people can set a reminder. A countdown runs before playback starts, chat is live throughout and Super Chat works, which is the whole reason to bother: broadcast atmosphere for something you edited three weeks ago.

When it ends the page becomes an ordinary video and behaves like any other in search and suggested. Creators expecting the format to add reach by itself are usually disappointed. It rewards an audience that already turns up, so it suits a launch or a first video back after a gap.