How to bleed mushy Tektro hydraulic brakes on a Bagi Bike

A how to video on bleeding Tektro hydraulic brakes on a Bagi Bike electric bicycle with no specialty tools like a bleed cup. Sometime air gets into the hydraulic brake lines and the brake handle goes all the way down to the grip and the brakes don't work. This is a method to remove the air bubbles and fix the brakes on this model of hydraulic brakes. Use only bicycle mineral oil available at most bike shops and Amazon.