Strange movement of the motor

Blue Robotics Products Thrusters and Motors
1

I purchased T200 rotor,Thruster core and Basic ESC two by two.
I read guide of Control the Basic ESC with a Potentiometer and Arduino and tried it.
But the motors moved strange.
Sorry for my bad English.
Please give me an advice!!
https://drive.google.com/file/d/19XcMXQKsYm_ffy-TsTFSX6lx7nfKe6TP/view?usp=sharing

2

Hi,

Check the wires going to the motor. usually when that happens one of the 3 wires has a bad connection.

3

Thank you for your reply.
I soldered wires. Is that a problem?
And I tried other ways.
I want to know if there are other possible causes.