Here is a great background on Tesla from wikipedia:

Tesla exhibited a pre-atomic understanding of physics in his writings;^[177] he disagreed with the theory of atoms being composed of smaller subatomic particles, stating there was no such thing as an electron creating an electric charge (he believed that if electrons existed at all, they were some fourth state of matter or “sub-atom” that could only exist in an experimental vacuum and that they had nothing to do with electricity).^{[13]:249[178]} Tesla believed that atoms are immutable—they could not change state or be split in any way. He was a believer in the 19th century concept of an all pervasive “ether” that transmitted electrical energy.^[179]

Tesla was generally antagonistic towards theories about the conversion of matter into energy.^[13]:247 He was also critical of Einstein’s theory of relativity, saying:

I hold that space cannot be curved, for the simple reason that it can have no properties. It might as well be said that God has properties. He has not, but only attributes and these are of our own making. Of properties we can only speak when dealing with matter filling the space. To say that in the presence of large bodies space becomes curved is equivalent to stating that something can act upon nothing. I, for one, refuse to subscribe to such a view.^[180]

We hope you enjoy the video and keep enthusiastic about science.

thanks to Nikita for the pic