First of all, modern ELT videos are very different from the materials of ten years ago. At that time most non-authentic video material had originally been designed for broadcast on television. The episodes were longer than needed for classroom use and the dialogue and action were slowed to accomodate the needs of the student studying alone at home. Nowadays, there is a good range of non-authentic videos designed for classroom use. Some have been designed as free standing video material.
Recent videos employ excellent, professional actors and directors, and use real settings.
The Teacher's Guides can suggest a number of ways of handling the same piece of video material. Mystery Tour , for example, gives alternative lesson plans for one, two or more than two lessons spent on an episode. A modern ELT video should prove effective and efficient. The vocabulary loading should have been planned, so that you avoid the endless explanation demanded by so much authentic material. The most important point has been kept until last.