Leenia, I think Bebey is playing in 6/4 and possibly 9/4. He uses additive meter's and quarter note stops which makes it a bit tough to be accurate, in addition he performs three bars in 3/2 I think. However his left hand keeps a basic common time beat with the exception of what may be the 3/2 bars.
In respect of Western music, 3/2 and rarely 6/4 do occur in British Folk Music. If you consult Bronson 'The Outlandish Knight' is commonly in 3/2, although there are two versions in 6/4 one in Bronson and the other collected by Steve Gardham. This is my attempt at actually answering some of your questions for a change as opposed to asking my own. Thanks for the video.