First met up with comrades at Dwango who run Nico Nico Douga at the end of 2007 and never knew they gave dannychoo.com permissions to embed their player! Could have had over a years worth of embed ToT.
The "sm1431183" you see highlighted in the browser address bar in the screenshot is the Nico id. Just like Youtube, you can now embed Nico videos like:-
So in the case for the stormtrooper video its:-
Members who have used the YouTube embed feature will know that its 1 "y" between the pound signs - for Nico its 2 "y"'s.
An example of a Nico video embedded below:-
The videos do take a while to kick start sometimes though.
Folks reading this in a feed or mail may not be able to see the video as the Nico player is domain referral based.
The distinguishing thing about Nico videos are the comments that hurl across the screen. Interesting to see what people say at times but in many cases can be annoying - turn off comments by clicking on the chick in the bottom corner.