How to change mindset?

I like to look into the video from the topic called how to change mindset.

I like the video from 7:40 - 8:30, the video is here.
You know how strong you are, mentally and physically. Go out there to compete every point.

Anxious, nervous, tired.
Stupid voice in your head saying that you cannot.
I work on so many years. I work on psychologist before.
Focus on things you can control.

The video starts from 10:00 - 12:00, the video is here.

Drama queen

anxious -> mindset change
work on so many years
anxious
last long match