The vast majority of people are unaware of what they are seeing. I am not sure what alien race we are dealing with here, but it could be the Greys from the Zeta star systems.
The electric field motor can be seen rotating in this video of the antigravity force field in operation.
Gray applied a DC voltage load to the tubular capacitors above the rotating chest field as the field rpm approached a certain value.
The faster the takeoff, the higher the tension! A brief burst of charging plasma can be seen during takeoff. The ionized air of charged plasma is trapped in an antigravity force field.
These incredible ships can travel at speeds of up to 30,000 miles per hour in our atmosphere.