Thank you mucho! I know this is a lot of work.
During the warm up, the water is sprayed from the inlet opening (the sort of dark brass thing in the middle of the back wall of the shot of the empty tank) up and over the load (think trickle down ecomonics) and pumped out as fast as it enters. You do have to be careful though about where you put that little detergent box because if the water pressure is high, it can flush some of your detergent away during the warm up like Robert showed with his video. I kept mine more to the front of the rack to avoid that.
Loading one of these is almost like loading a top loader washer. You can really stack stuff high. It holds far more than the 12 or 14 front-loading machines. I love being able to run it with part of the top rack removed. I do that thing with the lid open and pushing the start button to release the timer and turn it to the rinses and run one or two to really get things heated up and pre-rinsed. Then I restart it. If you put a folded towel on the lid, you muffle most of the noise since the tub walls are double to help with sound and heat insulation. You can always repeat the wash, minus the fill period, for really dirty things, by stopping it before it drains and turning the timer around, pressing the start button then advancing the timer out of the fill period. If you got the load properly warmed up, the water will stay hot in that double-walled tank for a 12 minute wash.