Just as a side note, this video is obviously a fake. The original source was from 20th Century Fox and the Youtube channel it came from was called Apes Will Rise, which is a movie coming out in the near future.
But what must be noted here is the incredible viral value of this short clip. It has been out since July 6 of this year, and it already has 3,035,389 views!(and rising) The thing is also getting passed around on places like Facebook and Twitter. Why does this have value? The return on investment is what makes it valuable. The cost to film and produce this clip was cheap, compared to how many viewers have checked it out and commented on it. All because it was downloaded on youtube.
If you were to pay for that kind of ad through television or film, you would not only have to pay for the production cost, but pay the networks involved to run the ad. Viral videos are a great tool for business, because of this ROI. But it also takes imagination and luck to make a viral video that works. –Matt