Thats what it looks like in your vid too, steering wise. I know how to use seperate axis on brake and throttle, and over 70% to the front is not "normal" bias as it should lock up your brakes and does so for me. I guess your pedals might be helpful yes. I'm ordering fanatec club sport pedals very soon since mine are broken and I currently use a very loose clutch pedal for brake. I still know how to control pressure though and are used to driving without abs.
It's not snap oversteer I'm getting, which I try to control to get harder turn in in the hairpin sometimes.
Anyway, the braking isnt the problem really, just something I noticed. Balancing the brake bias should only get my shorter braking distance so it's not a problem. It's the oversteer I cant control. If it's skill or hardware/wheel settings-related I dont know. But I know looking at your previous vid that was so much faster than me, if I choose those lines through the corners, I could not keep enough speed and would be much slower.