[Tony Curcio]

I watched your video a few times, and thought it might be squatting, but wasn't sure until you entered this last question.
The car will respond to shock adjustments better if you eliminate the squat. The instant center is too low when the body pulls down over the wheels at the hit. It looks like you have ladder bars, though I couldn't actually see them. If so, all you have to do is raise the front mounting point.
When the body starts to separate from the wheels/axle, use the shock settings from Mr. Ironside. Full stiff on extension will usually get you down the track in all kinds of weather, as long as the rear is separating.