There’s an interesting patent application from Google (GOOG) that was published earlier this month titled Web-Based System for Generation of Interactive Games Based on Digital Videos. Filed February 19, 2009 and published earlier this month, it describes a way to provide “the collaborative generation of interactive features for digital videos, and in particular to interactive video annotations enabling control of video playback locations and creation of interactive games.” And when you read through the description, it becomes clear that the games could be built atop videos submitted to a hosting site, which makes it sound as though Google plans to extend YouTube site into an associated gaming site