it seems you might benefit from looking further ahead and preturning earlier. at 0:47 of the second vid in the slalom, you were making sharp turns when you got to the cone, but if hard started turning earlier and more gradually you could carry more speed.
and at 1:07 it seems you abrupty straightened out (maybe there was a cone i couldnt see) but a more gradual straitening of the wheel earlier allows a driver to get on the gas sooner. this is accomplished by looking way ahead. as you enter a sweeper like that, you have to already be looking at your exit cone, so that your set up to go on the next straight away.
for auto-x: '04 Liquid Grey ZX3
for street: '02 Infrared SVT