This page is for admins.
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This makes a new render of the same moment and queues it for the render rig. The old one comes off the showcase and off the player's profile.
It does not remove anything from YouTube. The old video stays published and anybody with the link can still watch it. Taking it down is something an operator does on YouTube itself.
It is served from this site for an hour instead, which is the way to look at a render before anybody else does.