Today Plex released an app for Xbox One. If you haven't heard of Plex, you should really check it out. I'm a user, and it's great. It has apps to stream content to all my devices at home or when travelling.
When setting up Plex Media Server on a PC or Mac, you just point it to wherever your media is stored, and it'll automatically pull in high-res artwork, descriptions, cast information, and ratings. It's basically effortless; Plex organizes all your stuff and puts a beautiful user interface on top of everything. Once it's set up, you can watch your content using Plex apps across smartphones, tablets, set-top boxes, and now video game consoles.