LLM reel caption and video description + Refactor in services

app/Services/FileTools/VideoDescriptor/IVideoDescriptor.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Services\FileTools\VideoDescriptor;
+
+interface IVideoDescriptor
+{
+    /**
+     * Get the video description.
+     *
+     * @param string $filePath The path to the video file.
+     * @return string The description of the video.
+     */
+    public function getDescription(string $filePath): ?string;
+}