Easter egg in trailers (StarCraft 2: Legacy of the Void)

Perhaps I'm not the first to find this Easter egg, but I didn't stumble upon something like that on the forums)
Even when StarCraft 2 Wings of Liberty was supposed to be released and the first trailer for it was released, I watched it to the holes. Extremely amazing for this world, Starcraft. And then, I don’t even remember for sure how many years had already passed, I noticed something in the white noise that did not belong to him. It turned out to be a one-frame piece hidden in the video. And, then the same photo migrated to the rest of the trailers of the game's plot additions. I provide a screenshot from the trailer, everyone can be sure that I found almost 10 years ago)) Apparently, the photo shows the developers of this wonderful strategy. I did not have time to find out for sure who is in the photo. But it is known that they were very good there)