There's a lot of text in the YouTube video Description for this one, so I'll keep my addition here brief*, then copy/paste all of it below the break (click "explore further" at the bottom of post).
West Bloomfield 2012 Singles Exercise @ YouTube
Basically, this is a singles exercise that incorporates Moeller stroke motion, and also works a few other skills at the same time. If you aren't acquainted with Moeller, you may find yourself very tense when trying to play this exercise- if that's the case here (or ever), dial the tempo back big time, and create a simple exercise for yourself to analyze your stroke motion (preferably in a mirror). [don't fret: I'll probably end up making a post about Moeller/singles eventually]
The gist of the exercise is basically that you have to start with relaxed wrists before you can think about using your arm to lift for the slightly accented notes (which creates a somewhat "circular" motion that is natural to repeat/loop).
