Mr. Wagon (I can't bring myself to call someone "Fatty"),
If you watch the video you'll hear a miss, then immediately after, see a big puff of smoke, so I think the injector is firing, but perhaps one of the valves isn't opening or closing or sealing on one or more cycles, and on the next successful combustion cycle, the fuel is burned. If the injector simply weren't firing that wouldn't cause a puff of white-ish smoke.
If he's got a badly seating valve that seats intermittently, that would explain the engine's behavior. As for the injector firing, he's indicated it is firing when he cranks it over. No way to crank it over at 1500 rpm to see how consistent it is, though.
Halfnuts