ADB Video

Background
According to Johnny Walker of Northumbria University, ADB Video was an English company that existed (at least) in the summer of 1983.

(1983)
Logo: A red "ADB" caption, in bold and blocky text, on a black background.

Technique: None.

Music/Sounds: None.

Availability: Extremely rare: Walker mentions ADB advertising Fables of the Green Forest (Director unknown, 1978) and Tales of La Manca (Kunihiko Yuyama, 1980) as part of their “virtual childcare” range.