Hi folks.
From within SketchUp: Help Menu --> Help Center --> Learning SketchUp(top button in the left list with the title Get started). You shall get there:
http://support.google.com/sketchup/bin/answer.py?hl=en&answer=36207
There is an hyperlink labeled video tutorials in the middle of the first line of the paragraph entitled Start here: Video tutorials. Clicking it shall bring you there:
http://sketchup.google.com/intl/en/training/videos.html
Just ideas.