Videos on memory card can be watched while in camera, but when I try to download to computer it says the card is empty.

Save the pictures and videos on the card. Try reformatting the card in the computer, and then again using the camera. The first reformat will ensure the card is empty, and then the camera reformat will ensure that it is recognized by the camera. If the camera reformat will not work, try a new card.

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO A COMPUTER
If your photos and videos are stored on the memory card, then remove the 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 your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos to your computer. Then you can view them on the computer.
Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO A COMPUTER
If your photos and videos are stored on the memory card, then remove the 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 your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos and to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO A COMPUTER
If your photos and videos are stored on the memory card, then remove the 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 your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos and to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO A COMPUTER
If your photos and videos are stored on the memory card, then remove the 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 your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos and to your computer. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

ALTERNATE WAY TO TRANSFER PHOTOS AND VIDEOS TO COMPUTER
If your photos and videos are stored on the memory card, then remove the 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 your working computer. Your computer will see this as an USB Mass Storage Device or an external storage device; you can then open the folder on the memory card and copy the photos to your computer then you can play/view them on your computer.. Memory card reader is a handy device and is inexpensive. You can copy photos from other cameras and you can also download photos off your memory card to someone else's computer without the need of installing any programs.

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 cataloging program.

What is the make and model of your camera so that we may provide the link to the drivers which you can download and install? Also is the memory card showing up as empty when you are trying to copy the videos?

Try copying the videos using the memory card reader.

Hello, The videos will not be in the same folder where your pictures are. Follow these steps. 1.First, connect your digital camera to your computer. You can do this in two different ways: a.Use a USB cable. Most digital cameras come with a cable that connects the camera to a USB (Universal Serial Bus) port on your computer. The first time you connect your camera to your computer, the New Hardware Wizard will help you install the software needed to copy pictures and video from your camera. You may need to insert the CD-ROM that was included with your camera into your computer's CD drive or download software from your camera manufacturer's Web site. b.Use memory card reader. A memory card reader is a piece of hardware that plugs into your computer. When you're ready to download video, you can remove the memory card from your camera and insert it into your memory card reader, similar to the way you might transfer a file between two computers using a floppy disk. Picture of a computer with a memory card Tip: It's usually faster to use a memory card reader to copy your pictures or video than to connect your camera to your computer with a cable. If you don't own a memory card reader, you might want to consider purchasing one. They are inexpensive and will save you time. 2.Once you've connected your camera to your computer or inserted your memory card into your memory card reader, Windows XP will detect the connection to your memory card and ask what to do with your videos. Click Open folder to view files, and then click OK. Click Open folder to view files, and then click OK 3.Windows Explorer opens, showing your memory card. Your videos are contained within one of the subfolders of the memory card. Double-click each folder to locate your videos. 4.Once located. copy them to your computer and then select all and delete. Please rate my solution. Good luck, Jegan

I had success with this camcorder recovery software named asoftech data recovery before
http://www.asoftech.com/adr/

You need to take out the memory card or hard disk from camcorder, and then connect the memory card or hard disk to computer, you can then use asoftech data recovery software to recover lost videos.