Goodness. It does look like he lined up just inside the numbers so that's at least fine. If the play is allowed, need a UNS for using the substitution process with intent to deceive. That's an automatic.
However, there are some significant mechanics breakdowns here. LOS needs to go into substitution mechanic and get on radio if needed. R and U need to follow and prevent the snap. If the snap still occurs before it can be stopped, shut the play down as the defense was not provided the opportunity to match up. If first such event, warn, otherwise a UNS is appropriate.