I saw the video, and that was in reference to the VL-BB. Later engines, including Vision Line, all have 3 for the smoke fan motor. Since I've repaired a number of post 2014 locomotives with a flash code of three and replaced the smoke motor to fix it, I'll trust my experience. I haven't actually had a smoke motor failure on a VL-BB, so I can't say if that code is accurate or not for that specific model.
This will be my last word on the topic, you can believe what you like.