Can Anyone Work Out How This Functions ?

[unsure]

Background -
  Every hour or so,  there's a new video on youtube of two ( or more ) toy sized  electric-motors  linked up together,  with one working as a generator,  to form a   Self-Powered-Generator,  and they start up the devices ridiculously simply,  sometimes just by turning the motor or moving a magnet near one of them. 
     I assume the majority are fake, or else they would be too easy too build .

This thread however is about the following video,  showing a car converted to be fully electric -
https://www.youtube.com/watch?v=ETxw6cO6-k8

Regarding the video above -
- I cannot fully tell if the 2 motors directly turn the cars wheels
- Is this supposed to be a  Self-Powered-Device ( looped ),  or is there any overunity here,  or energy-amplification
- Would the battery  'ever'  need to be charged by an external power-source,  and could it be replaced by a capacitor-bank