"All education is beneficial. " This is absolutely not true! Some education, given in the wrong way or at the wrong time, can be very harmful!
I wouldn't let her see it without seeing it first, and then decide if it's appropriate.
I knew all about sex and my changing body before my mom had the 'talk' when I was in fourth grade. But I learned it from friends, which was not a good way to learn. In fact, they had learned from their parents and had a book with various positions/ect. So I had WAY TOO MUCH information.
This can happen, does happen often. I've talked to public schooled adults who say they knew everything in kindergarten thanks to their friends and classmates! So it's a good thing you ARE having these conversations now, but I wouldn't want her to see something like that without seeing it first. At the very least, watch it soon after she does so you know what was said and can discuss it.
My kids surprise me sometimes by bringing something up a long time after it happened and I don't really know what actually occurred.
I have FOUR girls, so I get to have these talks a lot. In my situation, birth/procreation is my profession so my girls hear about it all the time. They've seen births on film more times then I could count. So hopefully they will feel comfortable asking me questions.