Same team color. However....It could be that it's a skirmish match and team colors are turned off. IE: All enemies are red, but they're fighting against each other.
Maybe they had to quickly provide a screenshot of a burning barrack and that the enemy races where not done yet, or that the screenshot has been taken by a trainee?
^ possibly. Thats what i believe. They probably needed a quick screenshot of the Zerg ui, to see if it looks good and such.