The strom is a lot more maneuvrable than that...
Whoever shot that vido is doing whole lot of useless counter-leaning. he/she's got their body way off the bike on the opposite side of the turn.
That's not going to turn too well. For best results, stay straight up on the bike (or low down and to the inside, but that's not necessary at low speeds), look far 180 degrees opposite of where you are in the turn, and just lean it.
Practice slow wide circles first, then you'll find yourself gainind speed, confidence and lean angle. Before you know it, you'll tighten the radius and drag the centrestand.
In slow, sharp turns, I don't counterlean, I just modulate the clutch and throttle. if the bike is going to fall over, I just accelerate a bit or steer to straighten it up.
You can lean the bike more by counterleaning, but if you go fast enough, the bike will not fall over due to momentum.
I'll admit that I'm not too comfy turning tightly to the right on my wee (left is ok), and that previous lower bikes were easier to u-turn in the width of one lane (my wee kinda needs two).