It's a little hard to see because of the lighting, but there is in fact a bite shown here (in fact it's about the only thing visible in most of the second half of the vid.)
I understand the confusion. Laz explained it well. In this case, by first person, we mean that the camera exists in your story world.
In the case of Scott's video, he addresses the camera which tells us that he is aware there is a camera and he is shooting or working with and offscreen character to shoot the video.
But you guys raise valid concerns, we need to be more specific perhaps with requests.