It's clearly a penalty by the current rules.
Look at the example starting at :53 of the video. It's nearly identical to the foul called on Ford.
I think it's a bad rule because the QB, unlike other players, is likely to stop before he gets to the LOS so that he can throw the ball, so allowing the OL to protect his blindside is important for safety and the defender can see the blocker coming, but it's a foul none-the-less right now.