Interactive Youtube Videos
More filmmakers are using the annotations/ hyperlink function within YouTube to make interactive YouTube video. Jessie Clayton, former FdA Film student, did her own film within Experimental Media Arts module. Links to hers and others below.
UPDATE: This feature was removed by Google / Youtube around January 2019, and the interactive element no longer works on these videos unfortunately, as reported in this article on mashable.
One of the most popular interactive movies on youtube is 'Deliver Me To Hell' advert for Hell Pizza (New Zealand) done by Litter Sister Films.
See Interactive video page on pool for examples of current Interactive videos and how to make them.