These are very informative and I appreciate the work put into them. My only complaints would be perhaps a bit more preparation would help as there are often mistakes made, or confusion by the narrator requiring backtracking. There is also too much time spent on explaining things that don't require it which makes it tedious to watch. Finally, better quality microphones would help with the sound quality. But, there is a lot to be learned here and it's very helpful, especially to beginners like me. Thank you.