This site is DDF's take on BDSM. In 599 videos with a total runtime of over 177 hours, there is pissing, fisting, bondage with a lot of latex and leather.
There are also a number of doctor and/or nurse scenarios. This really is not dungeon BDSM as much as it focuses on the play rather than the environment in which the scenario is played out.
The great majority of the scenarios are lesbian ones, though there are a few with either a male dominant running the scenario or being used as the submissive plaything.