If it's samsung phone,you could try export video from samsung to computer via AutoPlay.
Windows PC has a feature called AutoPlay, which is a pop-up window with several options to deal with your device and appears when you connect your Android phone to computer with a USB cable. It is a simple way to transfer media files between Samsung and computer as well. By the way, this requires you to enable USB debugging mode on your Samsung, otherwise AutoPlay might be not able to access your Samsung files.