Cuper found this:
The narrator is French but the competition is in the city of Guernica, Spain. It's the 1961 competition to find the champion of the province of Viscaya.
There is at least a trick contest, and one to get coins out of the circle.
The winner who you can see in the film was Jose Luis Rementeria, "molinerito". The video was uploaded to youtube 10 years ago by his son, so we will try to contact him and get more information.
You can see a better quality version, but without sound, here:
British Pathé