Not possible:
Governments/corporations do not have any incentive of withholding technology since it would give them an economic edge over other governments/corporations. Why wouldn't you take it?
This would only make sense if there was a secret world government/corporation along with a secret research facilities and secret recruiting centres. This would have to be so big that it wouldn't be possible to keep it secret anymore
Especially since this secret super research facilities would have to recruits the best minds of every generation and somehow make them disappear from the public eye. This is just not possible.
The petman video proves nothing. It is inferior to a human to do universal tasks and it is inferior to a robot on wheels/chains to do specialized tasks. It might be an impressive prototype but still far away from anything that could have any real world use.



