With his right hand he seems to be alternating quickly between the front F and the D fingering for the harmonic false A.
Maybe a distant relative of the "Adderley trill" but it seems more similar to what Marc Russo does at 1:52 here
In the OP's clip at 1:49 its not the Adderly trill.
Its a repeated 4 note figure G A C A altoland notes...aka concert Bb C Eb C with some trill note thrown on top Have to listen more to figure the rest out but its a cool lick so will get it figured. No video slowing down skills
Its played over the 4 (Bb concert) chord in the 12 bar blues form of this tune
My apologies, I didn't even look at the video, just responded to the post about Adderley trill.
No this is not an Adderley trill, just a bit of nice finger waggling that creates a visual effect (something I used to do quite a lot). So basically playing a fast B - A - G with a trill on the B. I don't hear the right hand doing anything apart from possibly hitting the E side key, but maybe it actually is doing more but I can't hear it. Looks good though.