I believe I have seen the video you speak of, if we're speaking of the same video that was not a KelTec PF-9 (or any 9mm for that matter), it was something with much more kick.
As a side note, there is a video from a WS member demonstrating the weapon, how to load it and such, and in that video she puts the gun close to her face to show where it would need to be to hit someone in the face. I don't know where that video is as it was pointed out to me while discussing that this weapon can not be cocked manually, I'll look for it and post it if I find it.