It's actually really cute that you do this with her. I've wanted to do something similar, but my gf's daughter has very little attention span, nor do I have a webcam to do it anyway lol. You'd just hear her yelling at me about the zombies. Liked the video for you!
I saw the post, but you updated it before I got in to check it out. I don't think it would've been exploitative just because it's genuine reaction. If anything, it's a reminder of how powerful this stuff can be to kids. So I would've voted to upload it.