Ok, I'm just going to point out one inconsistency between the two frames, that is as clear as mud and indicates the claim of 'exact same time stamp' is bollocks. Look at the boots of the Penrith player DCE is tussling with - they are directly beside, and parallel to, each other in one of those frames; in the other, the left foot is clearly pointing in a different direction, and there's separation between his feet. That alone says the timing of those frames is not exactly in sync.
The positioning of his and DCE's elbows/upper arms is also slightly off between the two angles.
I doubt the video has been 'doctored' as such; but I also doubt that the time settings on the respective cameras were synchronised - or they were, and the time stamps have been doctored, take your pick.