Esc issue
 

Hello everyone, my esc is not working properly. When you turn it on it beeps twice like beep-half a second-beep. The throttle indicator led changes the colour randomly, it should blink in red and blink green when throttle. Also, it should solid green when full throttle.
At the beggining it doesn't react to the throttle input and then it gets too difficult to turn it off.
Here is the video
https://youtu.be/wTzC-5Qx1XI
The esc is a skyrc toro ts120.
Thanks in advance.

That looks like an ESC that has not yet been calibrated, have you gone through the calibration procedure? It's important to make sure your throttle trim is turned all the way down and your throttle EPA all the way to max before calibrating. With the TS120 and an MT4 your throttle channel direction should be normal (not reversed).

It has been working great for months. I will try starting from factory defaults and recalibrating. Thank you!