2) Physical Electronics, Electron Devices and ICs :-

Electrons and holes in semiconductors, Mechanism of current flow in a semiconductor:-https://www.youtube.com/watch?v=03j4ZvQCKWY
Carrier Statistics:
-https://www.youtube.com/watch?v=240GpzwhpzA

Hall effect:-
https://www.youtube.com/watch?v=ZDa1pVPI

Different types of diodes and their characteristics:-
https://www.youtube.com/watch?v=TXjHWGngsME
Junction theory; Bipolar Junction transistor:-
https://www.youtube.com/watch?v=CZlMt2Ta68I
Power switching devices like GTOs, SCRs, power MOSFETS:-
https://www.youtube.com/watch?v=QqFlHhSkayw
MOS and CMOS types:-
https://www.youtube.com/watch?v=zMAaZfh1yz8
Basics of ICs – bipolar:-
https://www.youtube.com/watch?v=2fOtOp4KXbM
Field effect transistors:-
https://www.youtube.com/watch?v=SjeK1nkiFvI

basic of Opto Electronics:-
https://www.youtube.com/watch?v=4rOxldv5nTM

standard book:-

Microelectronic Circuits by Sedrra Smith:-ftp://doc.nit.ac.ir/cee/y.baleghi/Electronics/Microelectronic%20Circuits%20by%20Sedra%20Smith,5th%20edition.pdf

Principles Of Semiconductor Devices :-http://www.eletrica.ufpr.br/graduacao/e-books/Principles%20Of%20Semiconductor%20Devices.pdf