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It looks like and sounds like it porpoised on the starting line, front and back started to rise and then the back slips back down, try stiffening up the compression, not the extension, on the rear shocks only. Take one of each (front and rear)shocks off and experiment with the settings on a bench so you know which adjustments does what to your shocks One other thing when you jack the car up to remove the shocks, check to make sure you have enough travel on both ends with the suspension fully extended down that the shocks have more travel left in them, not held up tight enough to hold the suspension up

I didn't see or hear that at all sounded more like a tight converter to me.