That's Trevor and Franklin in the background
Franklin says "Hi Dad!" and Trevor talks to my Dad in a separate video After an epic concert that I happened to attend with the guys from GTA V, I catch up with Ned Luke (aka Michael) and ask him and the guys to say "Hi" to my father...was better than I expected.
BTW I have another video of Trevor talking to him as well. I also have a 3 second video of Franklin talking to him, the camera was out of storage I think or low battery. Franklin said some cool things on the phone too. They were all very kind. Shawn Fonteno (Franklin), Ned Luke (Michael) and Steven Ogg (Trevor).