Videos: TV and support videos are designed to develop your interest in a subject by introducing thought-provoking questions, alternative viewpoints and practical issues. Support videos are designed for use with the relevant course study unit and are usually 50-90 minutes long. Our TV on video programmes are generally 30 minutes long and have been specially made by the BBC with Open University course teams. These programmes are free-standing, but are also designed to support the learning objectives of the relevant course study unit(s). They demonstrate processes and experiments, and show events, places or details that cannot be easily experienced at first hand or which are normally inaccessible.