Working with Virto HTML5 Bulk Files Upload as a feature
You can add the Bulk Files Upload feature to your site collection and use it by clicking the button on ribbon.
In the example above, the ability to upload files as list item’s attachments was displayed. You can upload the files to an item or library, using the button on ribbon.
You can adjust the feature on the Site Settings page by clicking on the “Virto HTML5 Bulk File Upload Settings” link.
The settings adjustment is similar to the web part’s adjustment.