‘Kay-Jazz’ - those VHSs were put out by TCB, a specialist jazz film distributor who operated from Frome, SW England. They supplied great films to specialist cinemas and TV channels in the 1970s/80s (I remember seeing one cinema ‘festival’ supplied by them in the late 70s which had much rare stuff e,g. the Rhapsody Film stuff and films with Sun Ra) and then they released VHSs which the likes of Mole Jazz used to stock. I’ve picked up quite a few of them. Notable releases were the ‘Frankly Jazz’ and ‘Jazz Scene USA’ shows.