MangaDatabase has 1,178 pic sets that are updated daily. When it comes to the actual manga, it is split into a Japanese section with 287 sets and an English one with 693 editions. The majority of material is hardcore, but some of the illustrations blur out any penetration shown in the drawings. Some sets have high-res images and you can download all of them in Zip files. There are a few other sections dedicated to other artistic styles or themes.
There is a section with demons and aliens stuff. Some drawings based on famous anime series come in a section labeled "doujinshi," which loosely translates as fan art. There are even a few sets of pics with shemales and yaoi (gay) scenes too. As is generally the case, you have every kind of storyline. There's pure fantasy, supernatural adventures and tales based more on everyday life. There are stories of naughty uniformed gals getting in trouble after class. There's also lots of BDSM and fetish spreads. There are even some kinky versions of some classic fairy tales.
There are no videos or animations. I guess technically that might not come as a complete surprise, because most people think of manga as the Japanese name for comics and anime is the word used to refer to Japanese animation. Still, animation in Japan is normally inspired by their comics, so you might think this site has some anime vids all the same. You'll have to check out some of the bonus sites to find any of those.
There are 10 of them, including Hentai Cinema, Hentai Sugars, 3D Supermodels, Hentai Mania, Flash Games For Adults and Comics Database. These sites offer some vids, but keep in mind that they also overlap content with one another. Membership is rather expensive, so you need to be a real fan of the genre to make it worth your while. Manga Database is so pricey that it will only appeal to serious manga lovers.