Itt a megoldás gépre és NAS-ra is:

1. Download Plex: http://www.plexapp.com/getplex/
2. Install it
3. Run the initial stuff and tell it where your media is, let it finish doing that
If the page isn't open already, in your notification bar right-click Plex's icon and select "Media Manager", this will open the Plex Web page in your browser
4. On that page, navigate to the media you want to play, click to play it
5. Click the Cast Tab button on Chrome while the video is playing, cast it to your Chromecast