I saw Mr. Brown’s video Music Theory 101, Part 1 A, I was amazed I’ve been playing acoustic guitar for 17 years as a hobby. I was struggling to improve, after watching your video on YouTube, a lot of things starting to make since. At the end of the video you wrote out the next steps where, harmonizing scales, building chords (triad), build 7th chords, chord progressions (what scales and Key to use), which scales over which chords. How can I see that next video? Thanks in advance I have been pulling out sheet music looking at flats and sharps and playing songs better than I ever played them before.

I believe you must subscribe to lessons with PB to gain access to that video.

You need to subscribe for paid lessons as Farelli mentioned.