To realize training responsive instantaneously to variation of real situation variable depending on the behavior of a trainer.

The video training system comprises a unit 8 for detecting the action of a trainer 4 and outputting that action, a unit 1 generating a time series video having a scenario independent from the action of the trainer 4, and a unit 3 displaying a video generated from the video generating unit 1 wherein the video generating unit 1 comprises a unit 13 for varying the scenario of time series video depending on the action of the trainer 4 outputted from the trainer motion detector 8. Since the scenario is altered while reflecting the will of the trainer, instantaneous decision making can be trained in a scenario not expected by the trainer. When the scenario is altered through physical action between the video and the trainer, a more dynamic training can be realized.