Though it sounds like an amateur medical diagnosis, this is actually a great lesson to beef up your waltz rhythm.
I can’t find the G run beginning in measure 41 that you show on the video. I would like to print it out for practice purposes.
Ahh! It’s in the pdf tab in the next lesson in the course: https://banjobenclark.com/lessons/waltz-guitar-rhythm-application-guitar-beginner