This is a student viewing guide edited video that provids a fast, yet fairly comprehensive, overview of the causes and events of World War II.
The video can be found at: https://youtu.be/rDTJc6doD8k
This goes quickly. I used it as part of an individualized project about World War II so that students could stop, go back as necessary, and proceed at their own pace. See the whole project at: http://www.mrvanduyne.net/wwIIds/2015/wwIIds_lanes_2015.htm
Please visit mrvanduyne.net for a variety of social studies activities!