I respectfully would disagree atcman23. It sounded like the dad was in control the entire time based on the pace of how things were going. It would not surprise me one bit he was controlling when the mic was on or not.
I also noticed the kid was given only two classifications of things to say.
1. clear for take off
2. contact departure
There was even one instance when the dad cleared a Jetblue flight to take off and there was wind information. The dad clearly had control there.
Risks? Not any higher from what I can gather based on the clip.