OK so this is one of those 'caveat emptor' moments. You get what you pay for and this is very very free. But if you know absolutely nothing about the Perl programming language and want to learn it but can't be bothered to read a book yet you do have 4 hours of free time, then give this guy a viewing:
I have gotten about 16 minutes into this before my eyes rolled back in my head. Mind you I already know Perl and I teach classes - though I have never taught a Perl class... So I can't throw stones per se, but at the very least, I am not in his target audience so it does not matter.