Interesting video on lifters

I don't recall any mention of the hydraulic effect between the cam and lifter. The viscosity of the engine oil will have a direct effect on the cushioning and dampening of the cam impacting and riding on the lifter face or vise versa. I would like to think their is some softening at and during the approch/entry cycle and a layer of lubricant filling in the microscopic voides between the two surface faces. Obviously or the parts wouldn't last 2 minutes.

Think about the impact effect of an object hitting water at 200 mph or whatever..