Extremely unlikely .. any problem caused by interference would result in loss of signal and the Phantom drifting in atti - not crazy flying. It wouldn't RTH smoothly and go crazy when control is switched to the Tx.
It would be simple to confirm by flying at another location.
The flight is rougher than it looks because the gimbal is trying to keep it smooth. Looks like an intermittent problem with the Phantom. I can't say what but perhaps an ESC or the flight controller?