Complex sentence: The sound is used on trailers for THX-certified movie theatres, home video releases, video games and in-car entertainment; it debuted in the THX trailer shown before the 1983 premiere of' in Los Angeles.
Split into simpler sentences: The sound is used on trailers for THX-certified movie theaters, home video releases, video games, and in-car entertainment. It debuted in the THX trailer shown before the 1983 premiere of' in Los Angeles.