Much too much link-following brought me to:
Knights of the Round Table (in Lego!) (http://www.ifilm.com/player/?ifilmId=2405283&pg=default&skin=default&refsite=default&mediaSize=default&context=product&launchVal=1&data=&realId=2405283&bw=300&mt=WMP)
This umm, this, err... started because I exclaimed "To the Myrmidon!" here at work. That led to Googling the word "Myrmidon", which led to the Wikipedia entry, which led to the Wikipedia entry for BattleTech, which led to the www.brickcommander.com (http://www.brickcommander.com/) website, which led to the official Lego Shop At Home website, which led to Googling "lego knights" which led to this link.
I think I better get back to work now <shakes head>
p.s. If you click on the link and get something else as a video, it's because they support their videos through commercials and you're watching a commercial.