The algae free mod is a bit noisy due to the design of the Maxi-Jet. The powerhead is made to run bi-directionally, which means that the impeller may spin either way when it is turned on. This isn't an issue when you use the parts that are intended for the pump, but the algae free parts don't seat perfectly on the impeller. So if at first the algae free mod is noisy, I would say shake it a little bit or power it up and down a few times. Eventually the impeller should seat better and the noise "should" go away. You do not want to put that mod on a timer or wavemaker.
Of course this shouldn't affect the mod from the youtube video, since they are using all the original equipment.