The best way is to use an HDMI cable, (assuming your board or card has HDMI), as that transmits sound as well as video. You motherboard might argue with you about the resolution, if the board is IGP. Intel Sandy Bridge graphics were asking for only 720p to be used, (with a monitor in use also). I can't specify what the max might be for any specific add-in card.
Intel's graphics driver would take you through the process of setting up the TV.
My favorite way of doing it, (when I bother), is simply burn .Mp4 files to a DVD, and shove it in my freestanding Blu-Ray player. (The player accommodates formats other than Blu-Ray or standard DVD-Video files.
I'm surprised you're asking this. "HTPCs", (home theater personal computers), have been all the rage for quite a while. With HDD capacity being multi-terrabyte as it is today, you can stuff a great may DVD files on one of them.
A one terabyte drive with single layer DVDs, would hold perhaps 220+ files. dual layer DVD would be about half that.
I'm and old stick in the mud though, and I still use free standing players.