I had to revise and re-upload this video as the arpeggios and drum beats were barely visible in the previous video. The new video re-linked above addresses this issue - I made their beats longer so they are clearly visible in the video. The previous video has been unlisted.
I don’t like it when I have to re-upload a video (YouTube doesn’t allow to replace an existing video) but lesson learnt and something to keep in mind for video producers.