Mark may have an ecm that is fully functional for a fraction of the price of a reman unit. I have bought a few from him over the years. He also may have a fully functional
vp44 pump for a fraction of the price of a reman. But I agree, sounds like ECM to me also. Shooting in the dark here, but buzzing under the valve cover could be the alternator? Or as Paul pointed out, grid heater relays. Waste gate rusted shut? Just going from the video you posted, I would say you have an ecm going bad. I don't know what would cause the wait to start light to come on while you are driving at the same time you have a misfire, other than ecm.