The amount of prepration, time, setting up, planning out, writing on the board, repeated pre runs, timing and speaking level settings, light settings, etc. an amount for these videos required a great deal of effort. I did them for absolutely nothing, so they may help people who, maybe for years have misunderstood music theory but always wanted to understand it. I noted that out of millions of people rarely has anyone been kind enough to do this.
Considering the amount of effort it took me, it amazes me how a few people seem to want to nit pick and point out a little mistake on lesson 6 instead of giving thanks for all my work. Don't get me wrong, I accept constructive comments but, on lesson 6 that you point out, I'd already put a annotated note about the minor little oversight and, I'd said I was just gonna quickly run through the F scale anyway. I was also aware of timing before video cut off.
People ought to try create free video lessons before they put comments on pointing out a little mistake.
I'd done 20 of these lessons and lessons for a few more songs. I'm reluctant to do any more.