This is not what our problem is. Our concern is the following:
1) The easiest option is to only allow external videos through Facebook, Youtube etc
2) The problem with that, is that if you want the video only to be available for the group members, someone can just copy the external video URL, and share it on Internet.
3) The main reason to use Easysocial internal video, is to prevent this.
4) But everyone that has access to the group, can simply copy the VIDEO URL (not the Easysocial URL), and share the video to anyone.
In this case here, the VIDEO URL is
https://shapingtheodds.com/media/community/videos/41/b1ccae00.mp4 and not the URL you have tried.
Is it not possible to store such a group VIDEO in a folder with the same login privileges as the user, so that the user will only be able to see the videos from the group he has access too, and also will have to log in in order to see the video mentioned above?