Guerrilla Miniature Games have posted an excellent video battle report featuring Elves and Undead. Clarence spends some time first discussing how the game works, particularly compared to Warhammer Fantasy Battles before the players settle in for a full game.
This video makes for an excellent introduction to Kings of War for any Warhammer player.
For those just interested in the battle report, this starts at approximately 27 minutes into the video.