The people in the comments aren't buying it.
Unsurprisingly, the video was posted by someone with the handle "UnironicThatcherite"
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Watch the kid's eyes at 0:14 right before the edit. He's looking off-camera for the next cue.
Then right after, watch the guy who casually "wanders" into frame to show off the back of his jacket, the same one all the other adults are wearing.