The standard method for enhancing students' listening and speaking skills involves giving them reading material the night before, so that oral discussion can take place during class the following day. With video, this separation is no longer necessary. A video program in the classroom, stopped at appropriate points and aided by proper preparation and questioning, can generate far more discussion than a text read the night before. The greatest strength of a video is its tremendous potential for contextualization.
Video provides audiovisual models, and also body language for students to imitate.
The possibilities are endless. The video program can become competitive. Each group watches for a different aspect of the current topic. You can cut out the sound track or the image to improve students' ability to infer and to make intelligent guesses. Do not expect students to understand every single word.