What is Jazz?

What is not jazz? Classical, rock, country, techno, flamenco, Japanese traditional music etc. are not jazz. What remains could be called jazz. Perhaps any kind of music heavily based on improvisation can be called jazz. Is Indian music jazz too? Well, I wouldn't call it that but someone could call it Indian jazz. No objection from me. Persian music can be very impovisational too but not at all always so.
Yes, I don't like "classical jazz", with some exceptions.

Now this is not American jazz, it is Indian. Starts at 3:25
http://youtu.be/eBHIE__7E-8

Yeah. And it is not only about jazz, it is about art in general. Tony Scott, an excellent musician, was, I think, one of the first jazzmen who spent most of his time abroad. Miles Davis played Agharta/Pangaea concert in Japan, John McLaughlin moved back to Europe in the late 70s though performs from time to time in the States, French director invited Miles to compose film soundrack.
A number of years ago I heard a Danish jazz/rock fusion group play, and it was great, almost as good as Mahavishnu Orchestra at their best. Jazz is very popular in Poland, Scandinavia and even France. Japanese are crazy both about jazz and Spain's flamenco.
What is going on here, in the place of origin of blues and jazz?

This was quite good, I think. Not Indian at all:
http://youtu.be/64RAslP-YQg

Orpheus10, this is really good, very powerful and sophisticated performance. Thank you.

Rok2id, let me guess. I think, in your last dreams French bothered you too much. And if this does sound like your high school band, well, what else might there be?