I’m not sure I follow. When Josh (and others) talk about flying fingers, this is referencing the fretting hand fingers.
Just to make sure we’re on the same page, this video describes what Josh is talking about when he says flying fingers.
5 Levels of Bass Finger Exercise (Beginner to Advanced)
Based on that, Davey doesn’t have flying fingers. He moves his hand to a more comfortable position when playing the lowest frets taking his ring and pinky fingers out of playing position but when he does this he isn’t usually using those fingers anyway. When he plays middle to higher on the neck and the piece calls for it, his fingers aren’t flying at all. This is really me being super nit picky critical in an effort to try and understand what you mean. Normally, I would just say Davey is an amazing player.
For the second video, I would say that is a good example of someone who has eliminated flying fingers completely.