A magnetic object attracts or repells another object with the exact same strength that affects it. Look up Newton's third law, in case your not familiar with it -- can't tell from your messages.
I'm just saying you don't have to expel a gas to form thrust. Seems like a lot of the arguments here are 'newtons law requires to expel something to form thrust'. But magnets don't expel a gas. The forces translate.
The presentation is not advocating that they are violating the 3rd law. Most people's argument here boils down to 'but but , thrust, the 3rd law, duh, I read an engineering book in school once'. And dismiss this out of hand.
He provides a prototype, at least give it the same attention as the high temperature superconductor and replicate it, then provide some explanation where the force is coming from that negates any benefit. Like find if there is some static charge at play that is causing the measurement error and would make it useless.
