I created some playlists (the one for history seems to have this url), and then made a channel, but didn't really understand what that means. There are so many sites where there's a difference between what you see when you're logged in and what you see when you just get to the page. Youtube is especially strange in this regard.
I haven't used YouTube much for my own stuff. The only one I have posted is this screencast about grading essays in Moodle:
Some people recommended blip.tv, so I posted my Guide to Historical Thinking there just to try it. It's kind of cool because it has a choice of players for embedding:
I listen to a number of podcasts on educational technology:
http://edtechposse.ca/ -- The EdTech Posse out of western Canada made up of leading educational technology profs and researchers
http://edtechtalk.com/WomenofWeb2.0 -- Women of Web 3.0 is a group of educators who host a podcast with great guests about using educational technology in class
This last is part of EdTech Talk which has many other podcasts and conversations also.
I haven't gotten into making podcasts, though I know some history profs do. They essentially create a little radio show for students to get through iTunes. Perhaps I could do this someday, but I think I'd rather head toward video.
My current thoughts on instructor-created video I love the idea of talking head video embedded into a screen that shows a slideshow. I just saw a good lecture on facilitation that was "webcas" using something called MediaSite that shows the speaker and the slides at the same time. I think if we are going to do presentation, we should use something like this, or at least something like Adobe Connect that embeds our talking head.