Can a 5v powerbank power a gearbox motor and high power motor driver

I make a bb-8 from this video I saw and decided to use a 5v powerbank to power instead of dc power adapter and was wondering if it could power all that.

Here is the the link:https://www.youtube.com/watch?v=-QbFvDIyy1k

Depends on your powerbank, and the motor power. E.g. my toy quadcopter flies for 5 minutes, then it must be reloaded for 30 minutes.

The capacity of a battery is measured in current*time (mAh). Divide that number by the current, drawn by your devices and motors (mA), to get the time (hours) your robot can run from a fully loaded battery. Better build your robot first, then measure its supply current and decide what batteries are required to run it for a certain time.