That's so true, and yet, I think your answer also explains why "what makes them so great videos" can work, in a way. The explanations given by Beato or whoever may be lacking in terms of the true why (is there really one?), but the enthusiasm of the presenter and the segments they choose to highlight can focus your attention on certain parts of the music and give you some of the insight they (apparently) have, even with it being unspoken. That's how it works for me anyway.

One thing I often notice is that if you listen to music with other people, you hear new things in it, because you are partially hearing it the way they do through reading their reactions.