Just use Plex. Prior to running a video, open the settings, select player, then reduce the quality settings( 480p 1.5mps local, disable direct everything). Downside is that plex's webpage is not optimal for the 3ds, plus side is that it supports remote streaming.
Any other steps? I've changed the resolution, and disabled the direct stuff, but I'm getting a "Failed to load video" error for all 3D movies.