There are a lot of Instagram dribbling drills out there, but you can’t really learn anything from watching them. For one, they are more focused on flash than they are function and nothing beats giving it a try yourself. When you have two balls this really helps with your hand eye coordination and makes dribbling with just one ball much easier. It also forces you to use your weaker hand so you are not tempted to switch to your stronger hand during the drills.
“Secondly, adding another basketball is going to increase the overall difficulty of the drill. Accounting for two basketballs is obviously going to be a lot more difficult than using just one, so if you can consistently handle two basketballs, then your hand-eye coordination and execution while handling only one basketball will be that much better.”