A clicking every couple of pedal turns (video included)
It looks to me like a stiff link in the chain. In the video there is a noticeable jolt in the chain through the derailleur every time there is a noise. 

The chain makes a full revolution only every few pedal turns, hence it’s a few pedal turns between each jump. 

Have a read here: https://www.bikeride.com/stiff-chain-link/

You could diagnose and fix it yourself, if you have a chain tool, but if it is a new bike, it’s something the shop should help you with in the first instance.