Air stone (bar) not creating bubbles? What could be wrong... video included...?

from what i see, i think you have too much air coming out of the clam, the clam is not supposed to be throwing out bubbles continuously. rather, air should collect slowly until there is enough to lift the cover and let the bubbles escape. air will follow the path of least resistance so all the air is escaping through the clam, what you should do is insert a valve or clamp to limit the air going to the clam and the air-stone should then work.