This video is not reliable. Both of the linguistics "did you knows" are specious. For example from (http://www.straightdope.com/classics/a2_236.html):

I never imagined that the day would come when I would spot an error in your witty and admirably researched column, but your recent discussion of the etymology of kangaroo, alas, shows you aren't up to date on the research in this area. In the Guugu Yimidhirr language, spoken by the aboriginals of the area where Captain Cook's party recorded the term kangooroo (the original spelling), this word (more accurately pronounced something like kang-ooroo) refers to a particular species of kangaroo, namely the large black kangaroo. The only error Cook's party can be accused of is mistaking the name of one variety of kangaroo for the generic term. I hope you will be able to bring your readers up to date on this question and disillusion them regarding the widespread mythology surrounding it. --Bernard C., Department of Linguistics, University of Southern California, Los Angeles

Given the 0% hit rate for linguistics, I'm not sure what I think about my tongue being my strongest muscle or whether or not elephants can jump.

I do know that it is true that elephants can't jump. I seem to recall hearing that the heart is the strongest muscle, and I am curious as to how anyone knows the handedness of polar bears.

But I can debunk one more claim on here. I myself have sneezed with my eyes open. It's not impossible. You just can't restrain the sneeze in any way. Just let it go full force.

And ducks definitely have an echo. Ask the Mythbusters.

Discarding this video. It failed to receive enough votes to get sifted up to the front page within 4 days.