After watching Late Night with the Devil, which is supposed to be a TV broadcast, I found two more Halloween-based films.
The WNUF Halloween Special is a fake TV broadcast. One of the highlights is the endless supply of fake UHF commercials. It’s an enjoyable horror film.
Ghostwatch was actually broadcast on the BBC in 1992. They used real broadcasters to portray themselves. It’s a very clever horror film.
I had never heard of either until looking for films similar to Late Night with the Devil. I’m glad I found them.