Bear in mind that each of those videos was taken at 300 fps, about 10x more frames per second than the human eye can resolve, and then played back in slow-motion.
So, I think you can probably resolve a lot more nuances in retrospect with slo-mo than you might be able to do with your eyes in real time on the field.
I’m not trying to tell you what to call a balk, or not call a balk, at any particular level of baseball–I was just trying to give people some slo-mo views of RHP and LHP pick-off attempts that were not called balks by experienced MLB umpires, working as part of 4-man ump crews.
If you’re interested to look at some more pick-off moves in slo-mo, visit my YouTube channel: (laflippin) and search “pick-off” among my uploads. You’ll probably find 10 or 15 more examples there. My original purpose was to give pitchers video to study for development of their own pick-off mechanics; however, any legitimate use of the information is fair game.