Queenless colony – can you tell from the entrance?

Can you tell if a colony’s queenless by observing the behaviour of the bees at the entrance? Here’s a video that suggests you can. If the bees come out with their wings open then fly off, it means the colony is queenless but if their wings are closed the queen is there. The video evidence is far from conclusive but has anyone seen this? Even better does anyone have slo-mo video of it?

An Old Timer’s Way of seeing if your hive is queenless