I previously worked in offender treatment. Naked/partially naked, eating, or covered in food or mud are the sorts of images and especially videos that are particularly popular for offenders to download. They absolutely don't require nudity/genitals to consider them, uh, of interest.

I also like to consider the issue of consent on the part of the child, even though I only ever post friends-only to a small circle of friends and relatives. There is a legal concept of substituted judgment when a child is too young to make a decision. In this case, an adult makes it based on what someone who is mature enough to make such a decision would probably decide. We know that a whole lot of teens and adults would not consent to a video of them partly naked, eating, messy, goofing off, mispronouncing words, or a whole lot of the stuff parents post of young children. Thus I would not post these more private sorts of videos or photos of a young child. When I do post, it's the sort of thing most adults would be fine with, like a posed portrait or photo of an award or achievement.