I don't post often but I do enjoy the discussions on this forum. On this specific subject I do have a strong opinion. While I too enjoy this style of music (Caldwell'S Song)very much I have never considered it "Jazz" and I think the controversy comes from applying that word to this style. Granted the musicians on this video are more than capable of playing jazz but this is not jazz.
IMHO it's funk/pop blended with R&B. Very nice style and I really like it. To me Jazz is improvising and creating live. That's not what's going on here for the most part.

joesax