That first video is not a demonstration of the current autopilot feature. It is a demonstration of a future full self-driving feature. Those two features are purchased separately from Tesla and have their own multi-thousand dollar price tags. I think it is reasonable to expect an owner of the car to know the difference between the two while a general public wouldn't have any clue about the differences. It is also reasonable to expect Tesla to do make the difference clearer. Their responses to this accident are certainly doing that by making it clear that the driver should be attentive.

Both videos also show attentive drivers who are able to jump in at a moments notice. The first video is a promo video and the second is from a Tesla fan. I wouldn't be surprised if they were specifically edited to showcase the car's features. I can certainly understand how someone might view these videos and think that autopilot is flawless, but I don't think Tesla is doing anything unethical in those videos.