From your video, it doesn't sound and look like there is anything significant preventing your bike from starting. I think you just need to fiddle around with different combo's of choke, throttle, etc. Once you get it started and get it rough tuned so it behaves relatively predictably, you will quickly learn many subtly different techniques to start it under all weather and conditions. This comes naturally to people who grew up before the advent of fuel injection. Try turning up the idle speed knob in half turn increments...I wouldn't go more than 1 and a half turns?