User blog comment:Jkphantom9/RWBY NYCC Panel details, possible RWBY manga???/@comment-4010415-20151009072134

Whoa wait wait wait. That image on the page. It was used as the thumbnail when you linked to the Nerdist webpage that had the sneak peek clip on Facebook. I just assumed it was an image the RWBY crew made up as a piece of advertisement for websites to use in their news about RWBY.

But...

if you copy the image location, the URL says it's named rwby-volume-3-still.jpg

IT'S A SCREENSHOT