THX "Make Your Own Trailer" Contest (partially lost entries from contest; 2006-2007)
THX is an American visual and audio company based in San Francisco, California, and founded in 1983 by George Lucas. It's logo/trailer (as well as the "Deep Note") has become a staple of the company and a part of popular culture.
In 2006, THX operated a contest for fans to create a trailer. Winners of the contest would get their trailer featured on the THX website and receive a THX Director's Chair. Many entries were submitted, but ten were chosen and won, and as of 2017, only seven are easily watchable on YouTube (with one of the six also being on Vimeo).
The following trailer entries are missing: