I am very familiar with YouTube.com. This site is wonderful and has everything one could ask for. I use it all the time to find free instructional videos and music videos about things I am interested in. Some good ones are:
-This is the best anime music video ever created according to www.animemusicvedios.org. It is called “Euphoria” and uses video from the anime RahXaphon and the song “Must be Dreaming” by Frou Frou. The vid is simply awesome: http://www.youtube.com/watch?v=B5zaFHmxBH4
-“Twitter in Plane English” is somewhat of a virtual representation of Twitter for Dummies. The “_____ in Plane English” series is great for all sorts of tutorials on real and funny/absurd topics.
“Twitter in Plain English” - http://www.youtube.com/watch?v=ddO9idmax0o
“Zombies in Plain English” - http://www.youtube.com/watch?v=bVnfyradCPY