Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/public/admin/video_modal.php

@@ -0,0 +1,27 @@
+<div class="ai1ec-modal ai1ec-fade timely" id="ai1ec-video-modal"
+    style="width: 600px; margin-left: -300px; margin-top: -200px;">
+    <div class="ai1ec-modal-dialog">
+        <div class="ai1ec-modal-content">
+            <div class="ai1ec-modal-header">
+                <button class="ai1ec-close" data-dismiss="ai1ec-modal">×</button>
+                <h1><small><?php echo esc_html( $title ); ?></small></h1>
+            </div>
+            <div id="ai1ec-video"></div>
+            <?php if ( isset( $footer ) ): ?>
+                <div class="ai1ec-modal-footer">
+                    <?php echo $footer; ?>
+                </div>
+            <?php endif; ?>
+        </div>
+    </div>
+</div>
+
+<script type="text/javascript">
+/* <![CDATA[ */
+    // TODO: Localize this variable using requirejs-suitable technique rather than
+    // this way.
+    var ai1ecVideo = {
+        youtubeId: '<?php echo $youtube_id; ?>'
+    };
+/* ]]> */
+</script>