The video is only half through at this point, and there are still 2728367 pages of sheet music in front of you... What do you expect?
Don't be overwhelmed by the amount of sheet music. There is a lot of copy&paste going on. The drone lick itself isn't hard, or hard to learn at all. Actually the licks itself are easier than what you have learned so far. The only complication is to use a more hand-stretched fingering, with the pinky always on C or Bb, meaning you have only 3 fingers left for the lick itself. And if you consider, the actual lick can be played with three fingers, in very limited range of your keyboard, it must be easy. So everybody can play this, even you lovely beginner, right?