Do you know the youtube channel, Sceptical open-mind? Check it out!
https://www.youtube.com/channel/UC4Hz4MQFzxCSGXcVcKaVsKA

You will be more sceptical about these so called inventors!

And I also don't think that there's such a machine as a perpetual motion. Because in detailed definition this machine would be a creator (godlike). Making more out of something. Like making more water out of water. It just sounds crazy impossible.