I will be interested to see comments from NFHS experts. But, this is always a dangerous practice to make a judgment based upon a single still photo.
But, at the moment of the photo, for NCAA, there is no foul here. Placing a hand on the BCs facemask - even continuously - is not a foul. Similarly, the BC placing a hand on an opponent's facemask - even continuously - is not a foul. Not until they get their fingers around a bar and are 'grasping', AND twisting/turning the helmet. No foul, otherwise. (I'm pretty sure this is different in NFHS - y'all still have a the 5 yard and 15 yard FM fouls.)