Love the acedemics. That is usually my realm. But the foil heads on this forum are out of my league. They are right, but just out of my league.
Keep it simple. The one thing you should get from the video above is that this guy is not sheeting all the way in. Even when he needs the most power. Sweet spot, sweet spot, sweet spot. Or rather, feel the power increase as you sheet out! Counter intuitive, but the reality none the less in light winds. Oh, and do sheet in a bit once the kite starts moving - just a bit.
Don't fill your head with the academics too much, fill your head with the experience to build instinct so you do not have to think about power, stall, and AOA. Save conscious thought for safety considerations.
The best way to do this for snow, is to get out on a grass field and fly in 0-4knt. Some days you will fail, but some you will gain more experience than your best day on the snow. Go out in 2-6knt in the water somewhere you can touch, but also float by pulling your legs up. You will have lots of kite drying sessions, but you will figure out the sweet spot with enough times out. Once is not enough in no go conditions (too light).