The MV for "Growl" is said to utilize a one-take method in which a steady-cam was used to shoot the video in one shot requiring no editing process. The result will that of watching a dance movie, according to SM Entertainment's press release.

It's also been revealed that various versions of the music video are in the making and will be revealed one by one!
[taken from allkpop article] via EXO Canada

**note: then I guess it explains why the other three private video's are still hidden

(c) exoabstyle