How large is the video you created? Depending on what device you are using to create your video yo may have a few options. Some devices will allow a micro USB cable connection to your computer, others will require you to remove the SD or MicroSD memory card and insert into a laptops media card reader. You may nee an adapter if using the MicroSD card. Then it’s just a simple copy function.
Connect the GoPro to your computer. Use the cable that came with your GoPro. Attach the end with the USB mini jack to your camera, and plug the USB jack into a vacant port on your computer. Connect the camera to one of the main USB ports on your computer rather than a USB hub or a port on your keyboard or monitor.