I thought the narrator audio was a little weird. I can't put my finger on it but I think it was more than just the narrators syncopation. Some words were hard to hear - I could make everything out, but I found myself distracted by it every once in a while. It might be an issue with compression or editing or being too far from the mic occasionally.

Also, I didn't know anything about your site before I viewed it. The video helped but I still don't know why someone would create a lesson. The end mentions something about "client acquisition" but I have no idea what that means. I assume the lesson creator wants to get email addresses of people so they can try to sell them something? Personally I think you should consider letting people sell complete lessons, rather than posting crippled lessons that require the lesson-master to try to hawk products through email.