I just stumbled across another excellent youtube video blogger (actually, youtube "recommended" it) named Scullcom Hobby Electronics. He's a Brit (sorry, don't know his name but he kind of resembles Michael Caine, the actor). If your a beginner like me, I can highly recommend his videos. I've only watched his constant current source video and his latest videos on building a function generator but the content and delivery I found to be excellent. I'm only plugging this because I enjoyed his videos so much. And no, I have no association with his channel. Check it out.
Ps. He draws the neatest whiteboard schematics I've ever seen.
*corrected name of channel