The eXtreme Restraints podcast has both an audio and video podcast. The hosts are Ian Rath and Aiden Starr. They normally have a guest on as well who they use to demonstrate a technique. So it may be flogging, nipple clamps etc.
It is a very good show for any Dom wanting to learn a new technique or newcomers to the BDSM scene. I highly recommend it as these are two season professionals and a lot can be learned from their podcast.