Maybe there's something on it which we can hunt down for the future releases.....
Bootleg/Recorded/Unlicensed Videos
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Alien
Special Edition video (from laserdisc)
Giger's Alien (1981)
Making of Alien video RARE! Includes Space Jockey construction, warrior head mechanical effects, shots of Giger constructing the original alien with bones and clay, interview with Ridley Scott and more. Subtitles
Aliens
Special Edition video (from laserdisc)
James Cameron: A Director & His Work (making of Aliens, UK)
Making of featurette. Including on Alien rental release (UK)
Alien 3
Workprint video (includes scenes cut from the film, usually of poor quality)
Alien 3: Bringing the Screams to the Screen
Alien Saga retrospective (recorded from HBO)
The Making of Alien 3
Behind the scenes feature, available in Triple Pack
The Making of Alien (UK)
Behind the scenes feature
Alien 3
Advance featurette
Alien 3
Now at the Movies featurette
Alien 3
Pepsi ad (long and short versions)
Alien 3
Awards nomination (Woodruff/Gillis)
Alien War (UK)
Segments recorded from This Morning & Express News (UK). Also Scottish TV feature
Alien War (UK)
Promo (London)
Alien War (UK)
Unreleased Making of feature
The Making of Alien Resurrection hosted by Ron Perlman
Video recorded from HBO
The Making of Alien Resurrection hosted by Brad Dourif
Video recorded from The Sci-Fi Channel
Behind the Scenes: Alien Resurrection
Video recorded from E! Entertainment Television
The Making of Alien Resurrection
Video recorded from TNT Rough Cut
The Making of Alien Resurrection
Video recorded from Movie Magic (several segments)
The Making of Alien Resurrection
Segments recorded from Access Hollywood, Entertainment Tonight, Good Day LA and Fox News
Alien Resurrection
Featurette (included on Widescreen Series videos)
Movie Magic
Several segments on the Alien saga
Skotaks segment