I'm trying to get this down, and Rosie is cooperating a lot better than my fingers! Lol.
I plan on working on this for the next month or so - and it'll be a bit different than in the vid, because I naturally strum with my right thumb instead of picking. I've got one heck of a callus on the left corner of my right thumb, and it's only getting more so. I also tend to grow out the left corner of that thumbnail so that I can pick with it when I need to.
Here's the lesson:
And here is Rosie with my little First Act MA-104 4-watt practice amp: