For a character to reveal private thoughts by talking is a soliloquy. The pretext is that the character is just thinking but has to talk so the audience knows them.
On the other hand, if you mean the character addresses the camera as the proxy for the audience, the character is breaking the fourth wall -- that is, showing awareness that it is a fictional ...
This sounds like the TV trope Breaking the Fourth Wall:
tvtropes - Breaking The Fourth Wall
But the precise thing that you remember might be a related trope. In the sitcom Liv and Maddie, the characters would often talk to the audience to explain what they felt or thought.
And those are called Confession Cam segments:
tvtropes - Confession Cam
"When the main character talks to the camera, is that 3rd person or another technical term for point of view?"
No – it is neither of those things.
"Point of view" usually refers to the point of view of the narrator, which can be omniscient, limited third-person, first-person, etc.
If a character breaks the fourth wall in a film – I ...
It makes total sense that their thoughts are in present tense. It doesn't make a difference that you don't use filler words. You're showing us their thoughts in the moment. To me it reads naturally that way and it's common practice as far as I can tell.
The answer to this question is actually neither of your thoughts. When a character talks directly to the camera and isn't in first person, it is called breaking the 4th wall.
You can most commonly see this in sitcoms such as "Call Me Kat", where the main character Kat, is constantly breaking the fourth wall to talk to the audience and making funny ...
I don't see why you can't do this. There is no rule saying you can't. It's all about execution, really. How well you pull it off. These things can be jarring to the reader if not done correctly. Basically, any time you change a primary element of your writing style, you need to be careful. But again, there is nothing that says you CAN'T do it at all. It's ...
If your goal is to get this read, I don't think there's an issue.
If you want to get this published with a publisher, I might use formatting (like an indent and additional lines before and after) to set this section apart, rather than font changes. I have a story with dream sequences, and this is how I set them apart. Sometimes the MC isn't the ...
There's no reason you can't do this. I have an (unpublished) essay that follows a similar format which garnered a number of personalized rejections and the only comments on mixing first/third person were positive. As with anything artistic, the key question is how well you manage the execution.