use makemkv to turn DVDs and Blu-Ray's into video files, it works like a charm and it's a free 30day trial. What nas would be good I do not know since I'm also looking into this myself, however the Zyxel NAS326 looks good to me if you're willing to buy your own hdd's, atleast for a basic movie library but I have no clue about how you setup cctv systems so I can't speak about that.