This is not typical AJ - the behavior is "off" - stilted, scripted and genuinely angry (as opposed to his normal/effective use of dramatic outrage. Something is going on - but what? Some possibilities:
Possibly - Got a cease and desist order from JA and doesn't want to risk a lawsuit.
Possibly - JA filed a lawsuit, and AJ is gagged from discussing anything PG related (although this doesn't explain the apology.)
Possibly - Pizza meant something else.
Possibly - TPTB reined him in, one way or another.
Possibly - PG charges are forthcoming, and reporting that could influence court proceedings are being muted. (Again, this doesn't explain the apology.)
IDK - crazy - the only certainties gleaned from this video are AJ doesn't like making it, and it's not "authentic" AJ. ("Authentic" referencing AJ's normal persona, not the content of what he says or suggesting it's an AJ double.)