Do I need to tune my tv to watch a dvd? I have connected my dvd player to my tv (I don't have an ariel, I simply want to watch dvds) do I have to tune my tv and if so, how do I do this?

WD TV Mini Media Player provides an easy and affordable way to play back your digital media on your wide screen TV.  It serves as a conduit between your TV set and USB drive storage, no matter it is a camcorder, a humble flash drive, or an external HDD. Simply connect WD TV Mini to your TV, plug a USB-connected storage into the player and you are ready to enjoy all your digital media in DVD quality playback.
WD TV Mini Media Player supported media formats:
Videos:
AVI (Xvid, AVC, MPEG4), MPG/MPEG, VOB/ISO, MP4/MOV (MPEG4), RM or RMVB 8/9/10
Audios:
MP3, WAV/PCM/LPCM, WMA, AAC, FLAC, MKA, OGG, APE
From the above list we can see that VOB is a playable format for WD TV Mini Media Player, does it mean that WD TV Mini can play all kinds of DVDs – whether home made DVDs or commercial DVDs? The answer is WD TV can not decrypt copy protected commercial DVDs, so you have to rip them. This tutorial aims to show you how to make it possible for you to watch commercial DVDs on your wide screen TV via WD TV Mini Media Player. What you will need is Pavtube DVD Ripper, it not only rips, but it encodes too. Following is the detailed operating steps:

Step 1: Click "DVD Rom", "DVD Folder" or "IFO/ISO" to load DVD files into this program.

Step 2: Select subtitle and audio track
Click on the pull down menu of "Subtitle" and "Audio" respectively to select your needed subtitle and audio language.
Step 3: Select output format for WD TV Mini Media Player
Click on the drop-down list at the end of "Format" to choose an output format for WD TV Mini Media Player. Your selection should be in the range of AVI (Xvid, AVC, MPEG4), MPG/MPEG, VOB/ISO, MP4/MOV (MPEG4), RM or RMVB 8/9/10. Here I select "Xvid AVI" as an example:

Step 4: Click "Settings" button to adjust video and audio parameters
The user manual tells us that when playback .avi (Xvid) video files, WD TV Mini supports up to 720*576 30fps or 720*480 30fps, so we need to follow the manual while ripping a DVD.

Step 5: Click "Convert" button to start DVD ripping
Once finished, you can get the generated files for WD TV Mini via clicking on "Open" button with ease. Afterwards, just copy the output files to My Passport portable hard drive or other USB drive, and then connect WD TV Mini to your TV, plug your USB drive into the player and you are ready to enjoy the movies ripped from your commercial DVDs.

For more: http://www.pavtube.com/dvd_ripper