How do i download a video to my computer S6100 digital camera

As of Sept 2 2016 there are several for sale on eBay, for about 7 dollars to about 12 dollars.
Search for "battery door", not battery latch.

Isn't that a Nikon camera? Nikon Coolpix S6100?

It has a built-in flash, you can activate it using the information provided in the camera manual. Nikon COOLPIX S6100

You can use it as primary source of ligth when shooting indoors or doing night portraits. You can also use it as a fill light. Read the manual.

Try NOT connecting your camera to your computer.

The best way to download pictures from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.

Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures from the card to the computer's hard drive, the same way you copy any other files. Or you can use any photo management program such as Picasa ( http://picasa.google.com ).

Replacement battery: http://www.2deals.net/Digital-Camera-Battery/Nikon/Nikon-Coolpix-S6100.html

Replace the battery: http://www.2deals.net/Digital-Camera-Battery/Nikon/Nikon-Coolpix-S6100.html

Replace it with a new Nikon s6100 battery: http://www.2deals.net/Digital-Camera-Battery/Nikon/Nikon-Coolpix-S6100.html

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO COMPUTER
If your photos and videos are stored on the memory card, then removethe memory card from the camera and insert it into an USB memory card reader.Connect this USB memory card reader and memory card into the USB port of yourworking computer. Your computer will see this as an USB Mass Storage Device oran external storage device; you can then open the folder on the memory card andcopy the photos to your computer.Memory card reader is a handy device and is inexpensive. Youcan copy photos from other cameras and you can also download photos off yourmemory card to someone else's computer without the need of installing anyprograms.

Format the memory card. Make sure your format the card each time you finish uploading your pictures to your computer, instead of simply deleting pictures.
If you can't format the card, try another card.

You don't need a driver. The best way to download pictures from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.

Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures from the card to the computer's hard drive, the same way you copy any other files. Or you can use any photo cataloging program, such as iPhoto on Mac and Windows Photo Gallery on Windows, and Picasa on both.

You can download a printable manual at http://support.nikonusa.com/app/answers/detail/a_id/17246/ and print it yourself or take the file to an office-supply store or printshop and have them print and bind it for you.

Currently Nikon does not list the S6100 printed manual for sale.