Not my video, but very interesting and very low power consumption.
" 150 nanoamps – calculated run-time on a single AA battery of 89 millennia."

https://hackaday.com/2019/03/25/magnetic-bearings-might-keep-this-motor-spinning-for-millennia/

Just a Notes some guys have found the tesla turbine will run perfect with no shaft no bearing to a unlimited speed the air flow
te air flow once start up  centers it making it float in the device and spin
and makes a air shaft air bearing no limit on speed  lay it on it side  make a ufo
 
use it as a gyro in boats

Tesla as a true genius

Dan
oi oi