That's a an old concept if you ask me as reactors of the past and even some today employ a similar concept, albeit different design.
I can tell you from my experience effective diffusion is when your design allows for an area where water and Co2 is mixed vigorously while having the least amount of micro bubbles escape you chamber. Don't get me wrong bubbles are good, but for aesthetic reasons the less the better.
So do you think it would work with good efficiency? I do have a sump area i may be able to do one of the videos above. I just want my aquarium to look as clean as possible