Videos on NAS stream wireless without computer to AppleTV?

Hi all,

I currently have a Synology NAS drive which houses all of my music and I am thinking about storing all of my purchased DVD movies on the drive so I can stream a movie to the TV via AppleTV without having a computer in the mix.

Is this possible? If so, what all is involved? Do I have to Jailbreak the ATV? Jailbreak intimidates me as it could brick the ATV. Do the files have to be in a specific format along with the drive being in a specific file format?

Thanks for any help,