Where are uploaded movies stored on iMac

I just upgraded to Yosemite.

I had some movies that I had downloaded as mp4 files and the uploaded to iTunes via the File->Add to Library option.

I just tonight uploaded another one by that method also.

When I hook my iPad up to sync, the iTunes screen on my Mac shows there are 31 movies, the one I uploaded tonight was listed along with 30 others. However, I didn't want to load ALL of these, so I just checked the ones I wanted then clicked SYNC.

This resulted in only ONE file being uploaded, the one I uploaded tonight. There rest are listed, but won't download to my iPad.

So what I want to find out is where the files are actually stored on my Mac so I can check to see if the other 30 are still there. I went to Username->Music->iTunes and while there is a iTunesMusic folder, there's no iTunesMedia folder.

Where would the video be that I uploaded?