This is how animation is done- the flipbook way!
We see video that is nothing but moving pictures, just that every picture with minute changes so-called “frames” are moved/ changed at rate of 60 frames per second. Well you can imagine if the world moved at rate less than this, everyone would have great reflexes! So this is a similar concept and old but still, cool one. Here is a flipbook animation illustrated by Serene Teh with technical pen, frame by frame. The song at the background is also cool and so is the animations itself!
Have a look:
Isn’t it awesome?