After watching the video, I completely agree. Sear is catching the hammer but because of the restricted pretravel the trigger bar is not popping up to re-engaging the sear leg. When you pull the hammer back annually it actually pushes up ever so slightly on the sear rotating the leg just enough to clear the trigger bar. Don't take this as an insult but are you sure you are turning the right screw for pretravel, and turning it the right way? I'd be curious to see the sear cage assembly from the bottom, maybe there is a burr or something if you're sure about the pretravel spring...
I just tried something else. Racked the slide/hammer, then removed the slide. Pulled the hammer while looking up under the sear cage. The trigger bar pupped up when I pulled the hammer back. Took the trigger out and adjusted the pretravel screw completely down, effectively putting as much pretravel into play as possible. That did it. I guess I just had not taken enough pretravel out.
I guess the pretravel screw crept out during shooting.
Thanks to everyone who chimed in on this!
P.S. Nothing is an insult when you're trying to diagnose from a distance.