No worries, I'm here
Big thing about that gif is is shows Marler's arse "kick-out" right after the feed happens. The Welsh pack straight, thinking they're about to get driven off the ball, but then it goes south (or right in this case) when the wheel is put on.
At no point is Robshaw legally bound, and he clearly has no intent to do anything about pushing straight judging by his body position.
If you want a REAL clue as to the English intent - watch Wood's feet (White #6 bottom of picture): after the feed, just as the half is getting around the back of the scrum - with no intent of picking it up - you see Wood put his hand on the ground, then his inside leg steps under him, his right leg steps right out, and he starts towing the scrum sideways around the Welsh LHP.
Mind you, Warburton doesn't do his THP any favours by diving in to try and piss Robshaw off. If Warburton had stayed on, and all the Welsh started driving through the angle of Cole's setup, they could have exposed Marler and Robshaw on that side of the scrum.
Also look at the shorts of the Welsh front row - I only see two white arses, meaning the hooker isn't putting himself in position to push as the third prop - this is another indication Wales didn't have their head screwed on right for this scrum, and England might have pushed them back even if they HAD pushed straight.
The main thing to note in terms of the direction of the scrum is NONE of the Pommy forwards drive over their own line - Marler crosses the hooker's feet, the hooker crosses Cole's, the locks don't even get NEAR the mark of the scrum.
Illegal as fuck, EXCEPT they weren't penalised, and its a thing of beauty in terms of coordination - ball in! 2, 3, SIDEWAYS! 2, 3, APPEAL TO THE REF!
The cure for this is what we did to the ABs earlier in the year - set your second row up for a shear drive (where you keep the front row straight, but angle the power from your big lumps) against the push of the LHP. It requires whichever flanker is on the opposite side to Marler to really put in, which is dangerous because if they take the ball off the back he'll be half a step behind.
But mostly it needs our LHP - Sio/Slipper - to attack the fuck out of their THP and make him twist. Likewise our hooker needs to try and break their hooker's neck, and Holmes/Kepu turns their shoulder out and compresses Marler's chin onto his neck. Moore/TPN
need to be propping at that point, and a full, low bind from the second row is required to push through the Pommy 2 & 3 in order to nullify the angle Marler is creating.
Meantime, Pocock and the other flanker wait to see if the ball is coming out, and snot whoever picks it up.
Only then will the Pommy 2nd row disengage and look like they're bringing it around the corner.
Mostly, with Twoite in charge, we need to get moving forward, even on our own ball.