I've watched all 45 lectures - each one a real "page-turner", if I can use that metaphor about videos. In the odd case where the material might seem a little boring, he cleverly cuts to real-world uses to keep the audience engaged.
Can't recommend these highly enough for anyone starting out in solid state electronics, with an interest in gaining an understanding of what's going on under the hood and learning simple analysis techniques. The lectures cover the following areas:
1. Diodes - PN junction
2. BJTs
3. MOSFETS
4. Intro to OpAmps
Don't be put off by the fact that these are aimed at a 3rd level audience, as he avoids use of complex maths or physics.
Would love to find more of his course lectures structured as these are (there appear to be some other of his lectures online, but not well structured into stand-alone courses like these ones).
The only prerequisite is that you should be familiar with basic circuit analysis of linear circuits (Kirchhoff's laws, superposition theorem etc.).