The video is for real. They just forgot to show the power supply . I noticed that the power distributor did not shift around on the table - not even when devices were plugged in or out. That is a tiny bit suspicious.
I have seen quite a few free energy devices. A colleague is about to build a new one currently. He already made half a dozen almost work. Without fail the devices I have been shown so far had flawed assumptions for the proof of concept or deliberately (?) faulty math in the calculation of the amount of energy they harvest. One of my favorites is the joule thief driving a LED from an "empty" alkaline battery.
The bad thing about the free energy community is that they show serious signs of sect behavior and many members have just enough education to fall for pseudo science.
The reason for the failure of free energy devices is usually attributed to a conspiracy. You may only guess how mighty the conspirators are as even mother nature supports the conspiracy by delivering inferior materials and modules that lack the desired properties .