This is a video that a friend of mine made of his 70 Undead Destruction Warlock doing some PvP (battlegrounds).

You can see his armory profile here:

http://armory.worldofwarcraft.com/character-sheet.xml?r=Shadowsong&n=Shareface

Edit: I added a FileFront mirror as requested (and I also added an AVI version to FileFront as the a mirror: http://files.filefront.com/70+UD+Warlock+PvP+AVI/;8067723;;/fileinfo.html, although the RMVB is a little bit higher quality and smaller than the AVI. If you want to view the RMVB file, you can use Real Player or Real Alternative).

I hope you all enjoy the video..