All your shared videos,photos etc will be saved to a drive and will be synced to the desktop.

This can achieved by the service provided by:-
1. Social Folders

You need to download there software and once setup ,it will run in the background syncing all your data automatically.

2.Backupify

Backupify keeps daily copies of all your social accounts safe and secure

It puts ownership of social media data and content generated on behalf of your company in your hands; not in the hands of individual employees. Our social media backup solution features the same security levels as our Google Apps and Salesforce products, too, including:

• Facebook Business Pages and Twitter accounts are automatically backed up daily
• SOC 2 Type II audited
• HIPAA compliant
• Safe Harbor compliant
• Built-in data encryption
• Data controls and monitoring, including audit logs, uptime and availability SLAs, and export capabilities
• Advanced internal controls
• Regular vulnerability management and testing