Considering all the "support the troops" themed ads, this Cobra recruitment wouldn't have been noticed until the punchline, which would then have huge impact.
This is a look at some of the stranger choices made by evolution (you know, if evolution was a sentient being). I found the video about seahorses especially funny (aside from the way the narrator says the word "seahorse": http://wtfevolution.tumblr.com/
Here is a trailer for "Family Guy: the XXX Parody".. as my first line indicates, this ain't really suitable for work.. however, it IS on youtube, so there isn't anything too explicit.
Let us give thanks to the North Korean government for giving us a glimpse into life in America - I didn't notice any of this going on right under my nose last time I was there! http://youtu.be/oKH-UnOvIso
This one exposes the American propaganda machine; unfortunately, some of it may be a little harder to poke fun at: http://youtu.be/xOGPwhTWZk8