If the videos are deleted from Android Phone’s external SD card, then you can use this very powerful third-party Video Recovery software. It is designed to retrieve deleted or lost video files from Android phone’s SD card.
Learn more about video recovery tool, here: rescuedigitalmedia.com
But if you have backup of your video on PC, external hard drive or any other location, then you can use that backup file to restore deleted videos and you don’t need Video recovery software.