That's still not enough to go on.
What is your distribution? Your desktop environment?
What exactly are these files? What formats? Where do they come from? How are they being stored?
Do you want to be able to find files according to specific dates/times, or ranges, just extract the data from all files, or what?
What do you want the script to do when you've found the matching files, list them, rename them, or what?
In short, the only person here who knows what you want right now is you. You need to define
exactly what you want
from start to finish before we can really help you. I suggest you read the big red link in my signature, then follow it up with this page for a more detailed treatise:
http://www.catb.org/~esr/faqs/smart-questions.html
Anyway, reading exif data from images is a relatively simple operation. Videos, however, don't generally store "exif" data; each format has a different way to handle its metadata. We'd need to determine whether the files even contain the dates you want first.
But unless it's just a simple operation, I don't think anyone will want to write a whole script for you. We can guide you along, but you'll have to do the bulk of the work yourself. Let us know if you need help getting started.
If it's just simple file renaming you want, you might take a look at some of the various renaming tools out there. I know krename can read exif data, for example.
