For Perl history buffs, there is a wealth of information available in this long London.pm 25 Years of Perl mailing list thread.

Though there are a number of Perl talks available at Shadowcat Systems LPW 2012 youtube channel, I couldn't find davorg's "25 Years of Perl" talk among them.

See also a detailed article at the Perl Foundation: The First Twenty-Five Years by Mark Keating (mdk)