User blog comment:Neww4518/fight for your right to add video/@comment-72.49.149.251-20130501205332/@comment-1221773-20130501211410

We don't permit video files to be uploaded or added to articles primarily because of potential copyright infringement.

There's also the issue that many videos (such as walkthroughs) have to show Commander Shepard (since he/she is the player character), and we prohibit depictions of Shepard in most cases in order to preserve the sense that there is no single canon depiction of Shepard and every player's story is valid.