In the video in question he states in the intro that he's going over the subject in brief and has links to other videos that more thoroughly detail the subjects. I do agree with you that sources are nice, and pointing people in the right direction for their own edification is important.
In the video in question he states in the intro that he's going over the subject in brief and has links to other videos that more thoroughly detail the subjects. I do agree with you that sources are nice, and pointing people in the right direction for their own edification is important.