You'll want to start out slow, let your body lean forward smoothly and at it's own pace, then, let momentum and gravity do their work, and you'll lean faster.
In that run, your arms didn't move one bit. To have a pretty decent looking run, you'll want them moving around, even just a tiny bit. Keeping yours arms in one place the entire run doesn't look too good, and it also accounts to stiffness.
Your footwork was alright. Try to have your feet flat, or very quickly from your heel to flat feet. It's probably just me, but I don't find it appealing to run on your heels.
Anyway, if you have trouble with going into the direction you want to move into, play around with your chest, your pecs, glutes, lumbar, and maybe even your shoulders and feet (If you stay on your heel, you can rotate into the direction you want to go in a lot easier, but it can also mess you up, so be careful).