Unify API port to 3002 and add video playback to search page

- Change localhost:3003 to localhost:3002 in demo pages
- Add video playback modal to page-api-demo-query.php
- Enhance search results with clickable video chunks
- Update search functions to support identity and universal search

themes/momentry/page-api-demo-operation.php

@@ -171,7 +171,7 @@ get_header();
 </style>
 
 <script>
-const API_BASE = 'http://localhost:3003/api/v1';
+const API_BASE = 'http://localhost:3002/api/v1';
 
 function showResult(elementId, data) {
     const el = document.getElementById(elementId);