Well, at the most basic level, I would bring the footage and the still into a comp, then use a mask to isolate the mouth in the footage. Place it on the still and use some feathering and colour correction until you get a look you like.
Or is this supposed to look realistic? 😉
It’s only work if you’d rather be doing something else…
Yeah I guess I would approach it in much the same way. Photo realistic is the plan though it still is supposed to look comical. I would also like to get some movement in the cheeks and the rest of the face. Thought if someone had come across a tute they could forward it through.