I'm not sure if I came up with this progression or discovered it online, but it's definitely a good one! This is a very sad sounding open chord progression, designed for alternate picking.
I recommend holding the chord shapes (as per the video) when picking through this progression.
This is a whole note scale lick from one of my tunes. It features some stretchty hammer-on/pull-offs and some fast picking at the end. Played more slowly I find this to be a good warm up exercise.