all in all, it's not bad. don't tuck your head back between your arms overhead and you'll get a more stable position. (see this for more on that - http://www.cathletics.com/articles/a...?articleID=119
that miss is really just a product of imbalance right from the start of the lift. off the floor you never shift back toward your heels enough and the bar is pulling you forward throughout the lift. couple that with you sweeping your feet back slightly as you replace them on the platform and tucking your head, and your base isn't under the bar, and your oh position isn't stable. you can see this starting even on the 80kg make, but on that lift, you shift your weight back much better, which is why you make it.
right off the floor, get back to your heels and keep your chest up - i think of this initial break as sitting back and up; in other words, the knees shift back, but the shoulders come too. you can try sn deadlifts - or segment/pause DLs in which you break the bar and pause for a couple sec 1" off the floor, then again at the knees, forcing yourself to get your weight and position set properly.