Finder not finding movies in Hard Drive search

I am trying to do some logical backups of all photos and videos from my MacBook Pro to two external hard drives (Iomega and My Passport). I have my full Time Machine backup on the Iomega. I also want separate photo/video folder backups on both.

When I do a search using Finder of my Iomega HD, it does not find any videos! Also, when looking through my IPhoto Library (after selecting Show Package Content), I see no videos on my computer! Yet, after digging around to find one particular May video, I can now see that video and some others created over six months, but they are all listed in the folder for that one May video (even though I have settings for showing by Date Created). Yet no other folder anywhere in my Masters folder (on either my computer or my external hard drives) shows ANY movies.

Yet in iPhoto, I can see all my videos. I am afraid to clean any videos off my computer when I cannot even tell if they are safely backed up elsewhere. And why can't I even see these videos on my computer using Finder?

Thanks for any help!

Let me restate my main question. I want to start keeping all videos on an external drive to save space on my computer. Videos are all mixed in with regular photos in iPhoto (though I have also made a Videos album for some of them).

I first need to back up all videos onto two external drives before I can delete them from my computer (from iPhoto).

How can I locate all these videos to copy them to the external drives without going through every photo one by one?

[Then, when making an iMovie, I will have the external plugged into the computer as the source of the original movie files.]

In Finder, with my mac drive highlighted, I click in the Search box. There is no Search Window with those options.

This is the finder window.

An update: From within iPhoto, I used the search feature there for all mov files and did get a list of 530. I tested Export on a few and it worked, to my external drive. But it looks like that may take a while for a large amount of videos.

I still would prefer to find those videos with Finder and just drag them by their folders to the other drive.

It wasn't until you mentioned having Users and Shared on the left side that I realized mine was missing. They always used to be there. I figured out how to put them back, but I never had Search on that left bar. Is that a Mountain Lion thing? I am still running Lion.

Do you know how I might add Search to the left bar?

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By the way, in the Options section below your Reply box you will see Attach Files. I had to use that to upload that screen shot I took.

Thanks for helping.

I do appreciate your help though. You got me thinking further and making some progress.