I haven't explored the guts of a QuickTime file, so I'm afraid I can't reply to #1-3. Therefore, I'll jump right to #4 and share the list of references that I've compiled on the topic of contributing a module to CPAN (although I'm sure you have already read most of them - maybe they'll be helpful to someone else):

• http://www.cpan.org/misc/cpan-faq.html (CPAN FAQ)
• http://www.cpan.org/misc/cpan-faq.html#How_contribute_modules (CPAN FAQ)
• perlmodlib (specifically the section entitled "Modules: Creation, Use, and Abuse") (perldoc)
• perlnewmod (perldoc)
• How to make a CPAN Module Distribution (PerlMonks)
• Learning Perl Objects, References and Modules (Alpaca), ch. 13 "Writing a Distribution"
• Learning Perl Objects, References and Modules (Alpaca), ch. 15 "Contributing to CPAN"
• Programming Perl (Camel), ch. 22 "CPAN" (very brief section)