When you accidentally delete files on Mac, you should first check the Mac Trash, if the deleted item is in Trash, then you can easily right-click the item and choose Put Back.
Sometimes, you may delete files on Mac bypass the Mac Trash, and then, you can still recover deleted files from the backups if there are available ones, such as Time Machine, cloud storage, and external storage media.
Unluckily, the Mac Trash is empty and there is no backup, if you want to recover the deleted Photo Booth video, you will need third-party Mac data recovery software, there are free and paid ones you can choose from. For a high recovery rate, risk-free, and read-only environment, user-friendly UI, etc., we recommend cost-effective iBoysoft Data Recovery for Mac, you can free download, install, and scan your Mac for deleted/lost files.