Disclaimer: This video isn't telling you how to hack/crack any software.
This video telling you about the basic/fundamental of how to create a C source-code using notepad and compile that source-code to .exe and open/load/debug that exe file with ollydbg software to start debugging.
I use/download these softs: TDM-GCC MinGW Compiler: http://sourceforge.net/projects/tdm-gcc/, and
Ollydbg from here:
The first step is write simple basic hello world program
The second step is to complie the program into exe file
The third step is
4th. Open Ollydbg software
5th. Drag your exe file to recently opened Ollydbg software
6th. Study your assembly code within Ollydbg software