I don’t really understand this phenomenon to give an introduction especially the part about the mirrors. I have no idea how mirrors can affect the weight of an object. Is this some kind of hoax? Or is this a real physical phenomenon? This is what is said in the video but it sounds like gibberish especially when they talk about “Images fly out”.
The weight is being scanned all the time while mirrored prism rotates. Images fly out of the prism through the gaps in all corners reducing the weight in accordancen with the Theory of Relativity. Also, permanent magnets are attached to the prism in ascendin gorder and therefore create a lifting force inside the prism. Heavy water just neutralizes the friction.
It says “Latests news in the pseudo-science world”. This youtube channel posts only hoaxes about perpetual movement or infinite energy or stuff like that, of course it’s a fake. =]