Otaku no Video (1991)
Original title: おたくのビデオ
Otaku no Video is a 1991 Japanese-language animation series. It stars Koji Tsujitani, Toshiharu Sakurai and Akio Otsuka.
A mockumentary featuring an animated tale of an average person who slowly becomes an otaku (obsessive fanatic) and eventually becomes the "Otaking"! Between story segments, live action interviews with fictional die-hard otakus take place.