Not the best video, but it does appear to me that the defensive player "braced" himself and put his shoulder into the receiver which would be a an illegal use of the hands violation of 9-2-3d as mentioned.
Perhaps you all have better video equipment, but after several viewings I couldn't discern if the potential receiver was a blocker attacking the defensive player focusing on a sweep who simply chose to defend himself. Of course the view from deep behind the offensive formation wasn't the greatest, and likely not nearly as good as the far side wing officials who would have had a direct, close view of both the contact and the lead up to it.
It's good to remember, only the offense knows (for sure) if the intended play involves a pass, or is a planned sweep where an off side receiver targets defensive backs. It did seem like that off side receiver was moving
DIRECTLY AT the defensive player who appeared mostly stationary up to the final "flinch" before contact.
Until the defense
KNOWS a pass has been thrown, offensive players are either runners, or blockers who are a threat, until they run past, or away, from a defender.