some suggestions not just for you for useful tutorials video or otherwise:-
basic c (using shellcode) (though basically 'smashing the stack' is pretty good here)
basic asm (making shellcode type stuff)
basic perl/py
uncrippling exploit code
Now these subjects sound very simple when put like that but are v. complex so I am not so sure they are do able plus there is a pretty good on on buffer overflow stuff out there and whole books have been written on the subjects. Maybe the uncrippling exploit code. A few same video tutorials isnt really the way to learn this stuff but I would pitch them with maybe further reading added in. In fact at least one of these tutorials is in my long term plans (expect to see it around 2048

)