My understanding is that the first intro sequence[1] was done that way, with analog video feedback, but for the Fourth Doctor's intro they were using slit-scan.

My understanding is that the first intro sequence[1] was done that way, with analog video feedback, but for the Fourth Doctor's intro they were using slit-scan. [1] https://www.youtube.com/watch?v=75V4ClJZME4 https://www.youtube.com/watch?v=75V4ClJZME4 ED: just realized that's probably what you meant by "original." Oops. Yeah, that's right. In camera effects!