I watched the video some time ago and what bothers me is that the author pretends to have hacked Perl while in fact he just found that some people are using a commonly used Perl module (DBI) the wrong way whereas the right way is well documented. A similar thing would be to blame PHP for allowing SQL injections through unescaped user input: I am sure it happens a lot, but who would blame PHP.
Actually, he breaks examples from the manual. I think his point was that programmers inherently write exploitable Perl code as they assume certain types are secure.
Well, every time I meet someone and they say they use PHP for their living my inter monologue is "Don't be a jerk and don't bash PHP, its a fine choice." I usually have to make sure I don't talk with them long and move along. I am a jerk either way.