Yes there is allot of videos on youtube, and the only other possible legitimate one is
But it is on a small generator that runs his compressor that runs the wheel, it does put out more than it uses but, and I do mean a big but, it shakes like crazy which means it still needs allot of work.
And it fairly obviously begins to slow down at about the 50 second mark (I guess the compressed air ran out), at which point the guy hastily applies the brake. In fact all the machines I linked to are just as possibly legitimate as your own, since any one of them, if it worked, would contradict Noether’s theorem, hence require the rewriting of quite a bit of mathematics as well as most of physics.
As for the tidal power one you are showing. I see a field of them to get enough power for your house and when a storm comes up I see them drifting off to sea, and you have no power. LOL It would cost allot of money just to get anchors deep enough to hold them and I do mean allot of them to be held. I use to be in the Coast Guard so I do know the ocean fairly well.
But the energy sector not at all it would seem. Very similar designs to the one shown have been in use in Canada, France and elsewhere since the mid sixties. However, most modern designs dispense with the dam and suspend the turbine (suitably modified) directly in the tidal flow, sort of like an upside down wind turbine.
Speaking of which, most offshore wind turbines are now simply tethered to the sea bed, usually by a trio of vacuum tethers. I’ve never heard of one breaking free in a storm and floating out to sea, have you?