Manually Manage Video Files
Open Computer or My Computer (depending on which version of Windows you have) and browse to the drive letter for your Nano. In Windows 7, for example, it shows up under Devices with Removable Storage and displays a graphic of the Nano for reference.
Locate Your Videos
Open the drive letter for the Nano, then open the folder called DCIM. On my Nano, there is a folder beneath it called 000APPLE, so open that and you’ll see a list of the videos stored on the Nano. Each video will have an MP4 video file as well as a DAT file associated with it. You only need the MP4 file for the computer.
Transfer Your Videos
Once you’ve browsed to the main video folder, you can copy them like any other file. It’s best to put them in the My Videos folder under your user profile in Windows, but you can stick them anywhere you please. Either drag and drop or copy/paste or even cut/paste to delete the video from the iPod after it has copied.
All of the videos will be stored with sequential names like IMG_0001, IMG_0002 and so on. Look at the date and time for each file to tell when it was recorded. These files can be renamed to anything you want, so watch them first and then rename accordingly for easier organization.
Any videos you don’t want can be deleted just like any other file. Just right click on the name and select Delete. Keep in mind that your Nano has a limited amount of space, so don’t leave too many videos stored on the device or you’ll run out of room really quick.