Making a phone app mockup

theK Posts: 53 Just Starting Out*

Hey guys, I have this footage of a hand holding a phone:

I was able to knock out the white screen, I've tracked the motion, and I have my content replacement ready to fill it in the phone.

Obviously the phone is not straight here, the starting frame has a warped perspective and it keeps changing throughout the shot.

How do I exact-fit in my content AND keep it steady?