Overall, the message wished to be brought across is as follows:
The slower you practice and are able to execute the scales, the faster you will be able to do so in the future. This is a key element and tip not only provided by Cheo Hurtado, but potentially by any music teacher. You must first familiarize yourself with what you are playing in a slow tempo and ensure that you are doing it correctly followed by speeding up.
It is important to first know the positions and to be able to do everything as if it was second nature to you and then start to increase the tempo as you know the scales or chords or even songs by heart. After all, the instrument can be played at an incredible speed, and the way to get there is to practice and to continue to practice.