I see no real value for pctuning.org - A way around the .org extension if trying to do something commercial on it, advertise loudly that a percentage of your proceeds go to some sort of charitable organization and add a mission statement to the site about a specific cause and offer a lot of free content.
You could still make a success out of it if you developed it, but sold domain itself, 0-regfee.
FemaleAnatomy.info could be a minisite with youtube vids like you said, but I think there'd be better and more profitable endeavors out there to invest your time.
eBay it for $5 bucks starting bid or contact end-users asking mid-high $xx