We did the encounter as my son is only 5 but booked it directly, not through Disney...Yes, they do take pics and videos. . You can choose to purchase them at the end.
One thing about the video,the video will include your entire group (that is all , not just your family). The pics are of your family alone.
They also offered, I think it was called, a Photo Album..This one you pay or decide to get before hand. They they take ALOT of pics of you which you can then choose from , and they make an album for you..
Sorry, but I cannot remember how much everything was...