http://www.youtube.com/watch?v=6669CCPAlEk

Great to see there is at least some novelty & imagination exercised in the world of 'jazz bass for want of a better phrase & that it's not all based on swing & bebop cliches.
Percy's Definitely my fav bass player.

Yes it is. That video, regardless of musical quality, is not jazz.

So you're definion restricts jazz to no more than improvisation over swing rhythms then. Meaning jazz would be forever bound to it's origins 100 years ago. Endless cliches over swing rhythms that have been death.

I see jazz more as dictionary.com's definition - Music originating in New Orleans around the beginning of the 20th century and subsequently developing through various increasingly complex styles, generally marked by intricate, propulsive rhythms, polyphonic ensemble playing, improvisatory, virtuosic solos, melodic freedom, and a harmonic idiom ranging from simple diatonicism through chromaticism to atonality.

In which case Percy Jones's music can be classed as jazz.

Well Robin that is also the characteristic of Cuban Music,(except originating in New Orleans), and not every thing is considered jazz. Gerry Zaragemca

There is no real definition of Jazz. Jazz seems to be all about intention. In other words, just like colors-I know "blue" when I see it, but I can't give you a definition of "blue"-I know Jazz when I hear it.
That video is Jazz as far as I am concerned.
But Yoggi Berra can't explain it better than I can:

Interviewer: "Can you explain jazz?"

Yogi: "I can't, but I will. 90% of all jazz is half improvisation. The other half is the part people play while others are playing something they never played with anyone who played that part. So if you play the wrong part, it's right. If you play the right part, it might be right if you play it wrong enough. But if you play it too right, it's wrong."

Interviewer: "I don't understand."

Yogi: "Anyone who understands jazz knows that you can't understand it. It's too complicated. That's what's so simple about it."

Interviewer: "Do you understand it?"

Yogi: "No. That's why I can explain it. If I understood it, I wouldn't know anything about it."

Interviewer: "Are there any great jazz player alive today?"

Yogi: "No. All the great jazz players alive today are dead. Except for the ones that are still alive. But so many of them are dead, that the ones that are still alive are dying to be like the ones that are dead. Some would kill for it."

Interviewer: "What is syncopation?"

Yogi: "That's when the note that you should hear now happens either before or after you hear it. In jazz, you don't hear notes when they happen because that would be some other type of music. Other types of music can be jazz, but only if they're the same as something different from those other kinds."

Interviewer: "Now I really don't understand."

Yogi: "I haven't taught you enough for you to not understand jazz that well."

That is totally beautiful, Stephan. Type it out again, but this time type backwards.....

Noe, he DID type it backwards!

Does it really matter, whether it is defined as "JAZZ"? It seems to me the question is,,,"Do YOU like it?" If YOU, don't like it. YOU Won't listen to it. If music isn't heard, it's like the tree that falls that nobody heard. Did it make any noise? I suspect there were some animals that heard it fall. Maybe we should ask the dog.

For the sake of full disclosure, Ken and Noe, I dug deep into my computer technology skills and cut and pasted the thing.(But I did it backwards!)

"If music isn't heard, it's like the tree that falls that nobody heard. Did it make any noise?"
Yes! It made the sound of one hand clapping.

Yeah, If you hold a mirror next to it and read it in the mirror it makes perfect sense. Most labels are like that, They have a sticky side and a smooth side. You put the sticky side on the bottle and read from the other side. Kind of like when you flush the toilet in Australia. Or if you read Arabic. It all depends on your point of weiv.

You dig what you dig..