Playful corvus monedula? Curious flying behaviour of crows
Channel: Stephan Goldberg
Date: 22/03/2018

Before I began to film this, it had been going on for a minute or two. 

There was a strong wind coming from the right side of the roof visible in the video. I assume that this created an updraft near the area of the chimney. 
The crows were able to easily land and takeoff from the chimney, however for some reason they decided to fly these loops for several minutes. 

Is it possible that they are just having plain fun, doing those flying manoeuvres or could there be another reason for this behaviour?

Comments are welcome