>>3082It's actually not always ideal to animate things at higher frame rates. That's one of the techniques used (#9 in the video). The frame rate you animate with can convey different things.
The whole animation is 24fps (as in film), but parts of the animation are animated "on twos" i.e. with each step taking 2 of those frames. The early movement of the mouth and eyes are animated this way to make them smoother. A higher frame rate would probably look too jittery because the movement is small enough that variation in the lines would stand out. The beginning of the jerk backwards is also animated on twos so each step stays on screen a bit longer to be easier to see. On the other hand, the windup (leaning forward and squinting) and follow-through animate on ones to draw the eyes and cause anticipation to make the larger movement more legible, and to compress the time it takes to go through those more minor movements.