L was in rotation at start of clip. C was ref'ing backwards and had no awareness the L had begun a rotation.
The C would have had to be in rotation immediately as the L started to cross the lane for them not to be that close.
Other than that, the defender did a slight position adjustment to his right. The defender is allowed to move laterally and back once LGP is established, contact was still torso to torso, the offense was in the least advantageous position prior to contact. I would have a hard time calling anything but a PC.
PS. Where are all those travel guys on this play?