I'd be interested in know how (or if) he's gotten past the disconnector spring force pulling the 22 bolt out of battery. The difference between a sear gun sitting in battery, versus an RLL in battery, with a 22 kit, is that after being tripped, the sear is no longer pulling back on the 22 conversion bolt, while with an auto connector, the disconnector continues to exert a backwards pull on the bolt. The full rifle caliber recoil spring has no problem overpowering the disconnector spring to keep things in battery, but the weaker 22 conversion frame recoil spring is easily overpowered by the disconnector spring.
Is it just a lucky happenstance of timing he's been able to achieve, or a lower-power disconnector spring or a stronger 22 recoil spring?
ETA: Ah, after viewing, the angle lets it slip past the trip after activation - clever!