Here's a quick crappy vid I did around 5:30AM with the first shot of the morning before work. This shows line pressure preinfusion for 4-5 seconds. You can slightly hear the machine 'moan' a bit as the line pressure water pushes it's way through the passages in the head. Once I see a drip on the basket, move the lever full up to engage the pump. (This shot ran fast. Very first out of a new bag and needed to tighten up the grind a bit.)