Added command to update all courses and chapters, downloading videos and checking video size is split into two queues, chapters can be mark to sync individually, updated readme, check if subscription is active, playback rate controll,

app/Http/Controllers/Chapter/Sync.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Http\Controllers\Chapter;
+
+use App\Http\Controllers\Controller;
+use App\Jobs\DownloadVideoFile;
+use App\Models\Chapter;
+use App\Models\Course;
+use Illuminate\Http\RedirectResponse;
+
+class Sync extends Controller
+{
+    public function __invoke(Course $course, Chapter $chapter): RedirectResponse
+    {
+        $chapter->update(['sync_offline' => 1]);
+        DownloadVideoFile::dispatch($chapter->id);
+        return redirect()->back();
+    }
+}