feat: Add YouTube video support and update admin templates

- Introduced a new YouTube tech integration in `youtube.min.js` for enhanced video playback.
- Created new admin template files for managing video settings, including `index.php` and `steasyvideo-pro.tpl`.
- Updated hook templates (`device_mode.tpl`, `forquickview.tpl`, `header.tpl`, `miniature.tpl`, `miniature_tb.tpl`, and predefined templates) to include video functionality.
- Implemented caching headers in several PHP files to improve performance.
- Ensured all new templates include proper licensing information and copyright notices.

modules/steasyvideo/composer.lock

@@ -0,0 +1,23 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "a373d9efff58dd240072b733ce534f28",
+    "packages": [],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=5.6.0"
+    },
+    "platform-dev": [],
+    "platform-overrides": {
+        "php": "5.6"
+    },
+    "plugin-api-version": "2.1.0"
+}