Definitely replace the crush washer and do not lift the vehicle the way he did which is really dangerous. You want to lift the FRONT FIRST, support with jackstands THEN THE REAR, support with jackstands. The side rail jackstand points have little indentations in the frame so you know where the jackstands go, technically it's designed for rail adaptors for the jackstands, basically it's a rubber pad with a groove that fits over the rail but I've never had a problem.
If your vehicle is lowered you cut 4 pieces of 2x6 lumber and angle one side so you can drive up on the wood first to get an extra +1.5 inches of clearance to get a low profile jack under the car
Level gauge bolt (dipstick bolt) is 45 INCH/lbs torque
This video gives a good demonstration of how to PROPERLY lift a G.