A Russian language-learning application. While there is a lot of video information in this example, the intent of the example is unclear. Voice-overs can be used to focus on the critical elements of a video. But consider how difficult it would be to represent the circulation patterns of the clouds in any other medium besides video. Time lapse of a flower's growth.
Video involves the dimension of time .
Any event that occurs over time is potential video material, especially when the time scale can be varied.