Go forward gently. I agree, a dvd to watch together is a great idea. Lots of talking points and a little less intense than a sit-down.
From my perspective, I think you are right to give your daughter information to empower her. I don't want to tar all men with the same brush, but when I was 8, I was molested by a 'family friend' while visiting my Dad's.
What I would have wanted to know at the time was that:
A. Mom and Dad were united in wanting me to be safe and to tell them what happened.
B. Dad wouldn't get into trouble with Mom because this happened.
C. They would have believed me, no matter what.
It took me 6 years to speak out to my mom, 11 years to say something to my dad.
What would be helpful is to join forces with her father; ask him to watch and talk about this dvd with your daughter too, so she's getting this support at both homes. Put it in the context of "because she is growing up in such a world" (not "because I can't see her when she's visiting at your place") and let him know that it's a powerful message for little girls to have these sorts of conversations with their fathers, and that you both want what's best for your daughter. In a home where both parents were present, this should be the norm too.
And definitely get the point across that "we won't be mad at you for telling". We do have to practice this in other areas of parenting, too, for this to feel 'real' for our kids. Like not getting furious when they tell you they broke something.... kids often do internalize a sense of shame or blame when they are inappropriately touched, and molesters are often emotional manipulators, so we have to model this "not being mad for hearing the truth" at other times too.
Added: I know the jury is out on this, but I err on the side of not relating my personal experience to my child. Kids don't see us as having been children, they see us as our present selves, the All Powerful Adult. It might be confusing to a child to know that their adult didn't feel confident in speaking out. "If our capable adult couldn't do it, how can I?" This might be a better conversation for when a child is older and can intellectually place us in the context of being a vulnerable child, maybe in the 10-12 age range, when they are moving out of young childhood and have some perspective on it. Right now, this might conflict with who they need us to be presently. Just my 2 cents.