1. Lee, which notes of the C major scale are you referring to?
2. the 5 chord happens on bars 9 and 12 on every chorus as it does in any 12 bar blues-type of song. It does not happen on bar 9 of the intro chorus, just bar 12 there.

If you count those bar numbers from the chart you will see they match. So start counting after the 1st 12 bars which is the intro.
Also, have a look at the bar numbers on the left of the staff lines, these are all correct as well.
Also I end each 12 bar section with a double bar line so if you count from the very beginning you will notice a double bar line after each 12 bar section. They’re not bold but you can always make them more so for an easier visual.

Hope this makes it clearer now but let me know if somethings still not clear I don’t want any confusion there for anyone!

1. Playing the other chords on the 5 chord? In the video when I play the 5 chord I don’t play the other chords. I don’t understand how you see that. Please explain the confusion here so I can try to explain.

yes I will be doing additional videos. this is why I put up this forum, to understand students problems etc. I want to gather everyone’s comments to know where any difficulties lie. I am here to help you and so to do that I must know how I can do that.
Thanks for your comments.
Johnny

Lee, I appreciate your comments and am encouraging others to do the same eventually to see where the gaps are and fill those as needed. Videos take time to make and so I need to gather much more information before doing this. But that’s why I put up this forum, so everyone can learn and move forward so hang in there!
As for the 5 chord thing, since I can’t slow the video down, you’ll need to watch it a few more times. This is normal but that’s the great thing about videos. The most important thing is to get familiar with the music. Meaning, get to feel comfortable with this 12 bar progression. When we can eventually “feel it” we just know when that 5 chord comes. The 12 bar thing is one of the most common in music. Follow along with the music chart over and over, listening to the instruments…zero in on the bass and chords for the changes. As soloists we need to be there too in order to make those changes happen correctly. This takes time: to learn the exercises and eventually play them from memory, in time to the music. Keep at it, it will feel different in a few days from now.

yes 16 bar intro because of the 4 bar pre-intro.
you’re starting off well with those. next work on matching up the modes with the chordal notes as in the lesson 3 video.

Correction to my correction. I didn’t see your note about the 4 bar pre-intro. I’ll stay with the 16 bar intro with the 4 bar pre-intro. Now we’re on the same page