Omnivorous Surfer

I am ashamed to say I had never check out YouTube for useful information. For fun stuff, absolutely, but never for anything that could remotely be considered helpful. Wow! What have I been missing?? I'm always on the lookout for resources that might become part of a workshop, either for preparation or sharing. I just did searches for "classroom skype," "windows file management," "microsoft office," and found that there are lots of tutorials as well as videos of people sharing what they are doing in the classroom. I can't even begin to imagine what else I might find as I explore more.