Some constructive feedback from what I see in that short video:
I see the your nose diving a lot under braking. It goes up and down and up and down. Try to be smooth on that first 5% of braking. Also be smooth on that last 5% when you're coming off of the lever. When you aren't - you upset the chassis which upsets the bike which fucks with the contact patches your tires have to the pavement. (Something you want to avoid.)
Also you can think "lighter longer" meaning you are on the brakes lighter but for a longer period of time. You don't need to get all of the braking done when you are straight up and down. Ultimately once you start applying the brakes - you want to carry the brakes and trailing off of them all the way to the apex. Not on/off on/off. Now don't get me wrong, you can't carry a bunch of lean angle and a bunch brakes at the same time. You'll tuck the front. That is why we trail off of them as we add lean angle.
You'd be amazed at what just putting the pad to the rotor does for slowing the bike when you are leaned over. These bikes are designed to be steered on the brakes. Get a feel for putting pad to rotor in the garage pushing the bike around. Just walk it and then gently pull the brake lever until you can hear/feel the pads touch the rotors. That is the kind of sensitivity I'm talking about.
A front tire can take more than you'd expect. But it won't if you're abrupt with it, you have to load the tire before you work the tire.
Speed = Radius. As you slow you are able to get your radius tighter aka your bike pointed where you want to go. The faster you get your bike pointed the faster you can then reduce lean angle and add throttle. The longer you're on the throttle around a track the faster you'll go (obviously). With you being on a liter bike this is really important. We don't call those 1k bikes point and shoot for no reason :).
Try to focus on being smooth. Smooth with your application (on and off) of the brake. Smooth with the application of the throttle. Smooth bar inputs. You'll get there, just keep coming out and you'd be surprised at when you can do!