In the last couple of years I have produced about 70 tutorials and demos. The ones that are still appropriate I gathered (as hyperlinks) in a pdf. I skipped those that are outdated (e.g. a series of 10 videos for Windows 8 Consumer Preview) and those that had gathered dust and were not up-to-date any more.
If you are interested, you can have a look at this Skydrive link. With a pdf enabled browser like Chrome, you can read and operate the hyperlinks directly in the browser. Else right click on the box and download the pdf. If you have any questions, let me know.
PS: If you have problems with the sound level of the videos, do this: Check the "Loudness Equalization" box in your Playback device. It is under the 'Enhancements' tab.