Why have offset camera placement? I've noted in recent times that many YouTube videos show a single person not always speaking directly at the camera. I understand from my limited experience to video production many years ago that looking directly at the camera presents "eye contact" between the presenter and the viewer.

In the case of an interview or in a video with multiple subjects engaged in conversation, having a camera out of line with the face of a particular subject  provides for a broader presentation, which can be useful in demonstration type videos.

I've done a few searches to this SE, finding it difficult to determine search terms. The answer presented in the closed question:
Why use different camera angles?
provides a confirmation of the information in the previous paragraph, in that there is more than one subject involved in the video.

It is disconcerting to see a camera shot from the 2 o'clock perspective (or any angle other than straight ahead) of the presenter speaking to the viewing audience, but not looking at the viewing audience.

I have not found a rationale for this camera position and suspect that it does not belong in any videos of my own creation or in those in which I will be involved.

This may sound like a rant, but it's a search for understanding ostensibly to prevent a future gaffe. It's possible, I suppose that it's a new presentation feature and should be included?

By request and from the camera view, directly to the camera:



Same video, from a camera placed off-line:



The video is of a doctor presenting information regarding the Corona Virus from YouTube. It starts a few seconds before the camera placement switch.
It can be used with different intentions, mainly to give the footage more dynamism.

The off-camera look gives the impression to be filmed like an interview, with an interlocutor in front of the presenter but off-camera.

Of course in this example there is no interlocutor, it is the camera, so it can make the impression of combining some "behind the scenes" footage. It adds a bit of "production value".

Sometimes the second camera does not film the person's face, probably the hands, probably the full body, and sometimes the interviewer, again not present in this case.

Probably a good option is using two off-camera angles.

It is simply a matter of style. Fortunately, the rules are not carved in stone.



One psychological effect from staring at the camera vs off camera angle is that the first one can feel like someone is "lecturing" you, trying to convincing you.

The second feels more like someone is just pointing at "facts" and you can decide or not to take them into account. That is why interviewed people do not look at the camera, but the presenter normally does.

This example probably tries to do both.