I especially liked AK's slide from Ni to ni below sa around 5:30. That caught me by surprise.
Here's the question: where is the equivalent of this vilambit or chowka kAlam assaying of a ragam in CM? There are fleeting glimpses in some neravals but they are usually too short and usually meant as the interim phase waiting for the faster tempo section.
And the absolutely minimalist accompaniment! In CM we hardly ever hear an unobtrusive accompaniment like in this piece. Here you can just about hear the tabla and the harmonium is virtually silent and yet how the voice carries -- it fills the space! I am not blaming our CM accompanists -- it is our culture that is to blame. It is as if we are terrified of quiet beautiful music.
I have heard similarly wonderful renditions in CM jam sessions but never in a concert. I would challenge fellow forumites to find a similar quiet but sustained piece from a CM concert.
PS. I found amusing AK's saying "yeh wohi Amir Khusro hain jinhone khayAl invent kiya thA" (this is the same Amir Khusro who invented khayal) as if saying anything more than "Khusro" is necessary.