That a documentary made in 2004 wasn’t shot in HD, (if only to future proof it) is weird.
Are you kidding? There were tv shows back then not filmed in HD, nevermind a silly documentary.
Which ones? Star Trek Enterprise was in HD, and it went off the air by 2005. Spielberg was talking about HD content in the 1990s, so it’s not like it would be crazy to shoot HD in 2004.
JEDIT: Above post reminded me there’s a big difference between TV shows and home video bonus content.
Enterprise was shot on film until the last season when it was shot digitally. All effects were completed in 720p.