I know it was released on video.
Videos can have a short shelf life.
Once High Street sales diminish, titles are withdrawn from sale without notice. When possible we endeavour to provide a 'cushion' by obtaining stocks of popular titles when we know a problem is looming. Of course, many films and broadcasts are unfortunately never released on video. This can be because of costs or royalty problems. Videos may be used in the classroom, in connection with a course of study, or by individuals for home use.