Found it (one of the few occasions where having your browsing history around is helpful); it's this one
https://youtu.be/GBjHXd2yqNw?t=270
Don't pay too much attention to the steaming section, as that's machine dependent. On my machine, if i do the gurgling as short as he did, i'd get warm milk, but not a lot of foam.
Pertinent content starts ~4:30. Also at 12:30 and 19:20. Once you get that flowing foam, you are 80% home.
What worked for me was a large latte cup (or almost a shallow bowl, as @stackie puts it), and starting with pitcher+cup tilted, with pitcher 3-4 inches above. Pour for a few second, drop the pitcher to cup level; level everything out, and that's when the foam begins to flow on the surface.
Good luck & keep us posted
