Seamless branching is a space-saving mechanism used on Blu-ray Discs and, rarely, DVDs, to allow multiple versions of a film to be stored on a disc without storing redundant scenes several times.
(An example of a non-seamless branched title is the DVD version of The Lion King).
Larger scale examples of the same technique are seen in the 2000 Ultimate Edition DVD of Terminator 2: Judgment Day,[2] the 2007 DVD rerelease of Blade Runner, the Platinum and Diamond Edition DVDs of Beauty and the Beast, and the 4K Ultra HD version of Conan the Barbarian,[3] in which three different cuts of the films are playable from the same discs.
Another possible use of seamless branching is for the localisation (translation) of on-screen visible text.
The Star Wars DVDs with their opening crawl are a prime example.