Board Thread:Support Requests - Getting Technical/@comment-10637-20180201175109/@comment-26871038-20180201214331

Andrewds1021 is right; the thumbnail is an  element and the video player you see in the file description page is an. While you can't replace the thumbnail on your article, you could use the old  tag (deprecated, but still works) to show the video player directly on the article.

To use this tag you have to put this where you want the video appear: