Looks like (at least) this vid is simply chroma-keyed, which is the exact same process the weather man on the local news and ranom youtubers alike use to remove the background (which could explain any abberations). In this case, I could see how he might insist that his surroundings be removed as to not give away details of his location. And any on-camera interview may have cuts to remove, for example - a cough or a sneeze or throat clearing, editing out complete lines if they felt he was veering off-topic, or if they needed to do another take, for any reason.

I hear what you're saying, but don't really see any reason why this would be faked when people could just say "he's lying" or "the leak is a larp", and brush it off.