I assume you're trying to install these modules using CPAN, which you've set up according to the wiki instructions?
Normally with helper modules, CPAN installs them automatically along with the main module. So, if you've installed Video::Info, you likely have Video::Info::Quicktime as well. Thus, once you have CPAN set up according to the wiki instructions, you can type
into your UNIX shell and the system should take care of everything else for you.
You can easily check this in your UNIX shell by running:
perl -MVideo::Info::Quicktime -e exit0
If that runs with no errors and produces no output, then Video::Info::Quicktime is installed correctly. If it does show an error, try running
perl -MVideo::Info -e exit0
to see if it can find Video::Info correctly. If perl finds Video::Info but not Video::Info::Quicktime, then simply type
to get it installed and double-check with perl to make sure it showed up ok.
If perl can't find either Video::Info, or Video::Info::Quicktime, make sure that the paths to your local CPAN directories that you set up according to the wiki instructions show up in @INC. If they don't, go back over the wiki instructions to make sure you didn't miss anything.
Hopefully that all goes smoothly. Don't hesitate to ask questions if I've confused you or if you could still use more help