The Fall of the Lich King by Onix definitely seems to fall in the "this is cool" category. It's got a blend of different Icecrown Citadel fights, including a half-dozen or so voice-overs from the game files. If you're experienced with this raid already, you probably won't see much that excites you. However, if you've not done Icecrown Citadel to any real degree, Onix's video will do a decent job showing you what the place is like. For that reason alone, The Fall of the Lich King is a nice video to have on tap.
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