COMMENT: "I Thought It Was You"…. but it may have been somebody else as it’s so dark it’s difficult to tell.
CHAMPAGNE: Keeping it in the cellar.
OTHER LIKES: The wind machine.
SPOTTED: You can see it better on a Dailymotion vid that’s in a higher resolution, but @ 0:38 on Doc’s clip, there’s a couple of blokes wandering around on another set in the background oblivious to what’s going on.
I think they are stage hands getting it ready for the next act. If you look closely near the start of the routine you can see what is possibly the previous act leaving the stage. I don't have this show to look back at the previous acts, but Dee D Jackson was the last on that was in the studio assuming the filming order was the same as the running order.