Pornographic Watergate Movie?

After watching Frost/Nixon earlier this month, I went on Netflix to look for other Watergate/Nixon related movies that would be interesting to watch after seeing the current one. I found several, including one that has actual clips of the Frost/Nixon interviews, another one about Nixon's re-election, and several others, many of which I put into my cue. Today the first one arrived, which I thought was about the recently revealed former FBI official who was the secret informant, Deep Throat. The name of the movie was logically "Inside Deep Throat" but when I put it in I wondered about the NC-17 rating at the beginning until I realized that this was a documentary about the 1970s porn movie of the same name. Ooops. Ironically, Nixon had a significant role in this movie too.