I’d like to show a 'gallery' of uploaded videos that are available to the user, similar in principle to that shown in windows explorer when viewing a directory of videos.

Not sure how to do it.

I’d like the first frame of a video to be displayed to give some indication of content, and I wonder if anyone knows how to do that without going to the trouble of playing the first frame, capturing it, and displaying it as a static graphic.

Thanks in anticipation.