the camera itself is prolly not recording hte sound, othewise it would be all windnoise. he prolly had a mic in the engine bay, or in/on the dash close to it. or he edited it out.
the camera itself is prolly not recording hte sound, othewise it would be all windnoise. he prolly had a mic in the engine bay, or in/on the dash close to it. or he edited it out.