I was working on my picking hand wrist movements playing familiar chords and got this.
Ended up changing the fingerings a bit towards the end of the original video which was about 10 minutes. You probably wouldn't want to hear the same melody for 10 minutes. The last part of the riff is a C chord and still need to figure out a decent way to end it. The basic chords are Am, D something, G something, C major. The D and G just moving some notes around and/or opening some strings. I thought it was pretty cool.
I put electric guitar strings on my acoustic, they feel really loose. Thought it was the same thing