I am not a beginner but wanted to scroll through a bunch of beginner's lessons cause sometimes you find som gaps.
One problem though:
I was in the rock section, the third level in total. I wanted to go through the lessons, however, I lost interest because I didnt want to spend the first 18 second of every clip to listen to the same intro again, again and again.
Some lessons are 1:10 long, the intro then makes up almost 20% of the video. And you heard it before.
I would suggest having a 5 second max intro, because at the end of the day you arent looking for that cool intro, you want the lesson. OR just have it at every start lesson of each section.
Otherwise I love what I see at the site and you should be very proud what you have accomplished.
All the best,
Axel