This popping sound didn’t really bothered me, but I found this link by chance that explains how to make it stop real quick.
As far as I know, this only affects people that have the Intel HDA audio chipset.

I honestly don’t know why this guy had to make a video to show people how to fix it… perhaps he wanted to brag?

However, the quickest way to fix it would be:

sudo vi /etc/modprobe.d/alsa-base.conf

(or you could replace ‘vi’ with ‘gedit’ for a graphical editor)
and hash out the line:

options snd-hda-intel power_save=10 power_save_controller=N

Save and reboot.