"We take for granted that we can interact with text, but up until recently it’s been a challenge to interact (read/write/talk) with media...
Being able to interact with video allows us to personalize video-based instruction, by leading learners to the segment of video we like them to watch, by adding voice-overs, notes, pop-ups, screenshots, maps, references, pauses. It also allows learners to create video with even more depth and features and can the interaction can be used to support media literacy learning."
A good overview on the available tools to make video interactive.
Excellent round-up of tools we have available to update our videos with voiceovers, notes, pop-ups, screenshots, maps, and references!