A number of old videos from the CD-ROM "Bryggen and Vågsbunnen", which I was the author of in 1996. This was an early example of interactive video, at least in a Norwegian setting. The quality of both video and sound is pretty bad, due to a low budget production and heavy compression in order to make the files small enough. The principles of how the story is linked together is, however, the most interesting in this context. I have recreated the functionality with YouTube's comment function.
The structure includes 16 nodes, linked together like this:
The comment function can also be used like this, to create a quiz with different endings depending on how well you do.