This is a good lesson that shows you how to use your thumb with the #4 (E)and #3 (A) strings. Remember to start slow and build speed. As you play it slowly you are just trying to get your muscle-memory trained. Soon you will be playing it fast and that's when it starts to sound right.
Also note that she is using a thumbs down position for her right hand to slap the strings. This can be played in a thumbs up position.
Bass Pattern in E
This lesson shows an E minor pentatonic scale (Notes: E - G - A - B - D - E) or (Intervals: 1 - 3 - 4 - 5- m7 - 8). Take note when she slides her left hand. There are two places where you should slide and they will depend on where you want your hand to move to the #3 string or where your connecting notes are. You can either slide during the transition from the third interval and the fourth interval or between the transition from the fourth interval to the fifth interval.
Can you think of other ways to play this scale in E? Try doing it using as many open strings as possible.
Bass Pattern in A
This is again a minor pentatonic only this time it is in the key of A. Notice how she starts her lick from the minor seventh interval(G, third fret on the #4 string). Notice how this changes where she slides up the neck.