A seven-year-old video showing a Tesla self-driving car has sparked much debate and controversy in recent months. The film, which was shot during the early stages of self-driving software, has been accused of misleading the public with inaccurate information. A Tesla engineer, however, has stepped forward to say that the film was never intended to be a realistic depiction of what was accessible to customers in 2016, but rather a demonstration of what was possible to incorporate into the system.