Used for purposes of illustration in an educational article about the video. The image is used as the primary means of visual identification of this article topic.
Protected by copyright, therefore a free use alternative won't exist.
Licensing
This image is the cover of a videotape, DVD, Blu-ray, etc. and the copyright for it is most likely owned by either the publisher of the video or the studio which produced the video in question. It is believed that the use of low-resolution images of video covers