What an odd question, considering you revealed in your own post that your father almost died from it.

I dunno what the videos on about. But serving properly poured, good beer in a clean glass will see the head cling fairly tenaciously to the side wall of the glass. This will keep the head from “slipping” off the liquid beer (so you don’t end up sipping liquid with no foam). And also leaves whats called a lattice,…