Moved video files to public/videos directory, small refactoring.

app/Http/Controllers/Course/Sync.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Http\Controllers\Course;
+
+use App\Http\Controllers\Controller;
+use App\Jobs\DownloadVideoFile;
+use App\Models\Course;
+use Illuminate\Http\RedirectResponse;
+
+class Sync extends Controller
+{
+    public function __invoke(Course $course): RedirectResponse
+    {
+        $course->chapters->each->update(['sync_offline' => 1]);
+        $course->chapters->each(fn($chapter) => DownloadVideoFile::dispatch($chapter->id));
+        return redirect()->back();
+    }
+}