UKPassats

Hi, just bought a new Passat; with just over 15k on the clock but wanted to check if this puffing noise on idle is normal? Don’t here it any other time. Pitch changes and doesn’t tend to whine so much as sound like an air pump.

Opinions would be useful! Thanks in advance. Here is a slightly dodgey video!

https://youtu.be/OaqvXkGgiiA