No, it is a bootable install DVD.
an .iso file is a compressed image of a CD/DVD that you would burn to a CD/DVD using a program such as ImgBurn (free) http://www.imgburn.com/
If you want to have a look at the contents of the DVD you have: Hold down the Shift key on keyboard and put the DVD in drawer, keep the Shift key held down until DVD drive light activity stops. You can then look at the files in Windows Explorer as you would with any other drive listed.
Holding down the shift key stops the DVD from automatically running the menu for choices of what you want to do.