Extending the WordPress Media Uploader: Custom Tab | http://ibenic.com/extending-wordpress-media-uploader-custom-tab

admin.js

var Library = wp.media.controller.Library;
var oldMediaFrame = wp.media.view.MediaFrame.Post;

// Extending the current media library frame to add a new tab
wp.media.view.MediaFrame.Post = oldMediaFrame.extend({
    
    initialize: function() {
        // Calling the initalize method from the current frame before adding new functionality
        oldMediaFrame.prototype.initialize.apply( this, arguments );
        var options = this.options;  
        // Adding new tab
        this.states.add([
            new Library({
                id:         'inserts',
                title:      'Lucky 5',
                priority:   20,
                toolbar:    'main-insert',
                filterable: 'all',
                library:    wp.media.query( options.library ),
                multiple:   false,
                editable:   false,
                library:  wp.media.query( _.defaults({
                    // Adding a new query parameter
                    lucky: 'lucky',

                }, options.library ) ), 
                 
                // Show the attachment display settings.
                displaySettings: true,
                // Update user settings when users adjust the
                // attachment display settings.
                displayUserSettings: true
            }), 
        ]);
    }, 

});

enqueue.php

<?php

add_action( 'admin_enqueue_scripts', 'ibenic_add_tab_script' );

/**
* Load the JavaScript on admin
*/
function ibenic_add_tab_script() {
    // Adding the file with the plugin_dir_url. The file admin.js is in root of our plugin folder
    // Change the URL for your project
    wp_enqueue_script( 'admin-js', plugin_dir_url( __FILE__ ) . '/admin.js', array( 'jquery' ), '', true );       
}

query.php

<?php

add_filter( 'ajax_query_attachments_args', 'ibenic_query_attachments', 99);

/**
* Change the query used to retrieve attachments
* The Query will retrieve 5 random attachments
*/
function ibenic_query_attachments( $args ) {
   
    if( isset( $_POST['query']['lucky'] ) ) {
 
        $args['orderby'] = 'rand';
        $args['posts_per_page'] = '5'; 
         
        unset( $_POST['query']['lucky'] );
    }
    return $args;
}

query2.php

<?php

add_filter( 'ajax_query_attachments_args', 'ibenic_query_attachments', 99);

/**
* Change the query used to retrieve attachments
* The Query will retrieve 5 random attachments
*/
function ibenic_query_attachments( $args ) {
   
    if( isset( $_POST['query']['lucky'] ) ) {
 
        $args['post_mime_type'] = array( 'image/jpeg', 'image/png', 'image/gif' );
         
        unset( $_POST['query']['lucky'] );
    }
    return $args;
}