National Geographic hosts an array of really interesting short videos, ranging from Science and Technology (my favorite of course ;-)) to Animals and History.
It is well worth a visit and it’s a guarantee that everyone will find a topic of interest (well, at least everyone with a thirst for knowledge…)
Also interesting is another NG show, a proper “treatment” of dubious, paranormal, or psychic stories using reasoning, logic and science. The preview video (at least the one I saw at the time of my visit) shows a guy that claims to be a vampire that sucks blood out of “consenting” people. Apparently, there are people willing to volunteer for such blood sucking/feeding procedures