There are programs that can help get back deleted videos. These programs look at storage devices. Find lost files. One program people use is Disk Drill. Disk Drill can get back deleted or lost files from drives, USB drives, and memory cards. It does this by looking at the device and finding parts of files that can be recovered. Another tool is PhotoRec. PhotoRec is free. It uses special methods to get back lost files from storage media. It works with kinds of files, including lots of video types.
People also use
video recovery program , like Recuva, to get back files that were just deleted. These programs look at storage sectors to find deleted files and get them back if the information has not been overwritten. How well they work depends on how you try to get back the files after you delete them.