I've been flying the aircraft for nine months so I might not know that much about it. In the video, the nose landing gear door is open but the nlg remains retracted. If the crew were to forget to put the landing gear lever down and then remember at the last second and then place the gear lever down, then the nlg would have tried to extend and that would have been obvious in the video. What the video showed is the nlg door open and the nlg retracted.

The EMB landing gear lever is only an electrical switch. The switch is either up or down. With no malfunctions, the nose landing gear doors won't open unless the landing gear lever was placed in the down position.

I've read in a different thread ("Eagle Gear Problems") on this forum that the problem was replicated while the aircraft was on jacks. This is unconfirmed though.