Tick Tick goes the magnum.

I just noticed your location is Twilight Zone. Lol.
A video never sounds right. Hard to tell what is normal and excessive that way.

Less chatter from shorter pushrods does not make sense unless the noise is all from the valves hanging open popping through the intake, running into retainer to guide clearance issues, or maxing out and binding the rocker arm travel. You may need to have someone get a fresh set of eyes on it, and not just local joker.