Generally, each time you sync iPhone with iTunes, all previous data will be backed up antomatically, you can also manually backup iDevice with iTunes. In other words, backup files have been in your computer as long as you've synced your iOS device with iTunes. As a result, the needed data can still be got back in even you lost your iPhone/iPad. So you can recover iphone photos or videos just with an easy-to-use iTunes backups extractor.