diff --git a/README.md b/README.md
index 1fdb9e5..572f907 100644
--- a/README.md
+++ b/README.md
@@ -324,7 +324,7 @@ await ytdlp.DownloadBatchAsync(urls, maxConcurrency: 3);
 * `.WithPostprocessorArgs(PostProcessors postprocessor, string args)`
 * `.WithKeepVideo()`
 * `.WithNoPostOverwrites()`
-* `.WithEmbedSubtitles(string languages = "all", string? convertTo = null)`
+* `.WithEmbedSubtitles()`
 * `.WithEmbedThumbnail()`
 * `.WithEmbedMetadata()`
 * `.WithEmbedChapters()`
@@ -333,8 +333,12 @@ await ytdlp.DownloadBatchAsync(urls, maxConcurrency: 3);
 * `.WithReplaceInMetadata(string field, string regex, string replacement)`
 * `.WithConcatPlaylist(string policy = "always")`
 * `.WithFFmpegLocation(string? ffmpegPath)`
+* `.WithConvertSubtitles(string format = "none")`
 * `.WithConvertThumbnails(string format = "jpg")`
+* `.WithSplitChapters() => AddFlag("--split-chapters")`
+* `.WithRemoveChapters(string regex)`
 * `.WithForceKeyframesAtCuts()`
+* `.WithUsePostProcessor(PostProcessors postProcessor, string? postProcessorArgs = null)`
 
 ### SponsorBlock Options
 * `.WithSponsorblockMark(string categories = "all")`
diff --git a/src/Ytdlp.NET.Console/Program.cs b/src/Ytdlp.NET.Console/Program.cs
index ebcdc30..e1573a0 100644
--- a/src/Ytdlp.NET.Console/Program.cs
+++ b/src/Ytdlp.NET.Console/Program.cs
@@ -7,24 +7,6 @@ internal class Program
 {
     private static async Task Main(string[] args)
     {
-        //Console.WriteLine("=== yt-dlp Output to Regex Converter ===\n");
-        //Console.WriteLine("Paste a yt-dlp output line below (or type 'exit' to quit):\n");
-
-        //while (true)
-        //{
-        //    Console.Write("> ");
-        //    string? input = Console.ReadLine();
-
-        //    if (string.IsNullOrWhiteSpace(input) || input.Trim().ToLower() == "exit")
-        //        break;
-
-        //    string regex = ConvertToRegex(input);
-        //    Console.WriteLine("\nGenerated Regex Pattern:");
-        //    Console.WriteLine(regex);
-        //    Console.WriteLine("\n" + new string('-', 60) + "\n");
-        //}
-
-
         // Must be the FIRST line — before any Console.WriteLine
         Console.OutputEncoding = Encoding.UTF8;
         Console.InputEncoding = Encoding.UTF8;
@@ -38,20 +20,20 @@ private static async Task Main(string[] args)
             .WithFFmpegLocation("tools");
 
         // Run all demos/tests sequentially
-        //await TestGetVersionAsync(baseYtdlp);
-        //await TestUpdateAsync(baseYtdlp);
+        await TestGetVersionAsync(baseYtdlp);
+        await TestUpdateAsync(baseYtdlp);
 
-        //await TestGetFormatsAsync(baseYtdlp);
-        //await TestGetMetadataAsync(baseYtdlp);
-        //await TestGetLiteMetadataAsync(baseYtdlp);
-        //await TestGetTitleAsync(baseYtdlp);
+        await TestGetFormatsAsync(baseYtdlp);
+        await TestGetMetadataAsync(baseYtdlp);
+        await TestGetLiteMetadataAsync(baseYtdlp);
+        await TestGetTitleAsync(baseYtdlp);
 
         await TestDownloadVideoAsync(baseYtdlp);
-        //await TestDownloadAudioAsync(baseYtdlp);
-        //await TestBatchDownloadAsync(baseYtdlp);
-        //await TestSponsorBlockAsync(baseYtdlp);
-        //await TestConcurrentFragmentsAsync(baseYtdlp);
-        //await TestCancellationAsync(baseYtdlp);
+        await TestDownloadAudioAsync(baseYtdlp);
+        await TestBatchDownloadAsync(baseYtdlp);
+        await TestSponsorBlockAsync(baseYtdlp);
+        await TestConcurrentFragmentsAsync(baseYtdlp);
+        await TestCancellationAsync(baseYtdlp);
 
         var lists = await baseYtdlp.ExtractorsAsync();
 
@@ -184,13 +166,12 @@ private static async Task TestDownloadVideoAsync(Ytdlp ytdlpBase)
             .WithFormat("ba/b")
             .WithExtractAudio(AudioFormat.Mp3)
             .WithConcurrentFragments(8)
-            .WithOutputFolder("./downloads")
-            //.WithHomeFolder("./downloads")
-            //.WithTempFolder("./downloads/temp")
-            .WithOutputTemplate("%(title)s.%(ext)s");
-            //.WithEmbedMetadata()
-            //.WithEmbedThumbnail()
-            //.WithRemuxVideo(MediaFormat.Mp4);
+            .WithHomeFolder("./downloads")
+            .WithTempFolder("./downloads/temp")
+            .WithOutputTemplate("%(title)s.%(ext)s")
+            .WithEmbedMetadata()
+            .WithEmbedThumbnail()
+            .WithRemuxVideo("mp4");
 
         // Subscribe to events
         ytdlp.OnCommandCompleted += (sender, args) =>
diff --git a/src/Ytdlp.NET/README.md b/src/Ytdlp.NET/README.md
index 620c690..72a8479 100644
--- a/src/Ytdlp.NET/README.md
+++ b/src/Ytdlp.NET/README.md
@@ -347,7 +347,7 @@ await ytdlp.DownloadBatchAsync(urls, maxConcurrency: 3);
 * `.WithPostprocessorArgs(PostProcessors postprocessor, string args)`
 * `.WithKeepVideo()`
 * `.WithNoPostOverwrites()`
-* `.WithEmbedSubtitles(string languages = "all", string? convertTo = null)`
+* `.WithEmbedSubtitles()`
 * `.WithEmbedThumbnail()`
 * `.WithEmbedMetadata()`
 * `.WithEmbedChapters()`
@@ -356,8 +356,12 @@ await ytdlp.DownloadBatchAsync(urls, maxConcurrency: 3);
 * `.WithReplaceInMetadata(string field, string regex, string replacement)`
 * `.WithConcatPlaylist(string policy = "always")`
 * `.WithFFmpegLocation(string? ffmpegPath)`
+* `.WithConvertSubtitles(string format = "none")`
 * `.WithConvertThumbnails(string format = "jpg")`
+* `.WithSplitChapters() => AddFlag("--split-chapters")`
+* `.WithRemoveChapters(string regex)`
 * `.WithForceKeyframesAtCuts()`
+* `.WithUsePostProcessor(PostProcessors postProcessor, string? postProcessorArgs = null)`
 
 ### SponsorBlock Options
 * `.WithSponsorblockMark(string categories = "all")`
diff --git a/src/Ytdlp.NET/Ytdlp.cs b/src/Ytdlp.NET/Ytdlp.cs
index 2194748..861ffc6 100644
--- a/src/Ytdlp.NET/Ytdlp.cs
+++ b/src/Ytdlp.NET/Ytdlp.cs
@@ -41,6 +41,9 @@ namespace ManuHub.Ytdlp.NET;
 /// </remarks>
 public sealed class Ytdlp : IAsyncDisposable
 {
+    // ==================================================================================================================
+    // Immutable configuration fields events and flags and contructors
+    // ==================================================================================================================
     #region Frozen configuration
     private readonly string _ytdlpPath;
     private readonly ILogger _logger;
@@ -879,8 +882,12 @@ public Ytdlp WithMergeOutputFormat(string format)
     /// <param name="auto">Write automatically generated subtitle file</param>
     public Ytdlp WithSubtitles(string languages = "all", bool auto = false)
     {
-        var flags = new List<string> { "--write-subs" };
-        if (auto) flags.Add("--write-auto-subs");
+        var flags = new List<string>();
+
+        if (auto)
+            flags.Add("--write-auto-subs");
+        else
+            flags.Add("--write-subs");
 
         return new Ytdlp(this, extraFlags: flags, extraOptions: new[] { ("--sub-langs", languages) });
     }
@@ -936,7 +943,7 @@ public Ytdlp WithExtractAudio(AudioFormat format = AudioFormat.Best, int quality
     /// <param name="format">(currently supported: avi, flv, gif, mkv, mov, mp4, webm, aac, aiff, alac, flac, m4a, mka, mp3, ogg, opus, vorbis, wav).</param>
     public Ytdlp WithRemuxVideo(string format)
     {
-        if(string.IsNullOrWhiteSpace(format))
+        if (string.IsNullOrWhiteSpace(format))
             throw new ArgumentException("Remux format cannot be empty", nameof(format));
         return this.AddOption("--remux-video", format.ToLowerInvariant());
     }
@@ -949,7 +956,7 @@ public Ytdlp WithRemuxVideo(string format)
     /// <param name="audioCodec"></param>
     public Ytdlp WithRecodeVideo(string format, string? videoCodec = null, string? audioCodec = null)
     {
-        if(string.IsNullOrWhiteSpace(format))
+        if (string.IsNullOrWhiteSpace(format))
             throw new ArgumentException("Recode format cannot be empty", nameof(format));
         var builder = AddOption("--recode-video", format.ToLowerInvariant());
         if (!string.IsNullOrWhiteSpace(videoCodec))
@@ -988,18 +995,7 @@ public Ytdlp WithPostprocessorArgs(PostProcessors postprocessor, string args)
     /// <summary>
     /// Embed subtitles in the video (only for mp4, webm and mkv videos)
     /// </summary>
-    /// <param name="languages"></param>
-    /// <param name="convertTo"></param>
-    public Ytdlp WithEmbedSubtitles(string languages = "all", string? convertTo = null)
-    {
-        var builder = AddFlag("--sub-langs")
-            .AddOption("--write-sub", languages);
-        if (!string.IsNullOrWhiteSpace(convertTo))
-            builder = builder.AddOption("--convert-subs", convertTo);
-        if (convertTo?.Equals("embed", StringComparison.OrdinalIgnoreCase) == true)
-            builder = builder.AddFlag("--embed-subs");
-        return builder;
-    }
+    public Ytdlp WithEmbedSubtitles() => AddFlag("--embed-subs");
 
     /// <summary>
     /// Embed thumbnail in the video as cover art
@@ -1056,11 +1052,26 @@ public Ytdlp WithFFmpegLocation(string? ffmpegPath)
         return new Ytdlp(this, ffmpegLocation: ffmpegPath);
     }
 
+    /// <summary>
+    /// Convert the subtitles to another format
+    /// </summary>
+    /// <param name="format">(currently supported: ass, lrc, srt, vtt)</param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentException"></exception>
+    public Ytdlp WithConvertSubtitles(string format = "none")
+    {
+        if (string.IsNullOrWhiteSpace(format))
+            throw new ArgumentException("Subtitle format cannot be empty", nameof(format));
+
+        return AddOption("--convert-subs", format.Trim().ToLowerInvariant());
+    }
+
     /// <summary>
     /// Convert the thumbnails to another format. You can specify multiple rules using similar WithRemuxVideo().
     /// </summary>
     /// <param name="format">(currently supported: jpg, png, webp)</param>
     /// <returns></returns>
+    /// <exception cref="ArgumentException"></exception>
     public Ytdlp WithConvertThumbnails(string format = "jpg")
     {
         // Supported: jpg, png, webp
@@ -1070,6 +1081,25 @@ public Ytdlp WithConvertThumbnails(string format = "jpg")
         return AddOption("--convert-thumbnails", format.Trim().ToLowerInvariant());
     }
 
+    /// <summary>
+    /// Split video into multiple files based on internal chapters. The "chapter:" prefix can be used with the output filename for the split files.
+    /// </summary>
+    public Ytdlp WithSplitChapters() => AddFlag("--split-chapters");
+
+    /// <summary>
+    /// Remove chapters whose title matches the given regular expression. The syntax is the same as <see cref="WithDownloadSections(string)"/>. 
+    /// This option can be used multiple times to remove multiple sections"/>
+    /// </summary>
+    /// <param name="regex"></param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentException"></exception>
+    public Ytdlp WithRemoveChapters(string regex)
+    {
+        if (string.IsNullOrWhiteSpace(regex))
+            throw new ArgumentException("Regex cannot be empty", nameof(regex));
+        return AddOption("--remove-chapters", regex);
+    }
+
     /// <summary>
     /// Force keyframes at cuts when downloading/splitting/removing sections. 
     /// This is slow due to needing a re-encode, but the resulting video may have fewer artifacts around the cuts
@@ -1077,6 +1107,20 @@ public Ytdlp WithConvertThumbnails(string format = "jpg")
     /// <returns></returns>
     public Ytdlp WithForceKeyframesAtCuts() => AddFlag("--force-keyframes-at-cuts");
 
+    /// <summary>
+    /// The (case-sensitive) name of plugin postprocessors to be enabled
+    /// This option can be used multiple times to add different postprocessors
+    /// </summary>
+    /// <param name="postProcessor"></param>
+    /// <param name="postProcessorArgs"></param>
+    /// <returns></returns>
+    public Ytdlp WithUsePostProcessor(PostProcessors postProcessor, string? postProcessorArgs = null)
+    {
+        if (!string.IsNullOrWhiteSpace(postProcessorArgs))
+            return AddOption("--use-postprocessor", $"{postProcessor.ToString().Trim()}:{postProcessorArgs.Trim()}");
+        return AddOption("--use-postprocessor", postProcessor.ToString().Trim());
+    }
+
     #endregion
 
     #region SponsorBlock Options
@@ -1781,10 +1825,10 @@ public async Task DownloadAsync(string url, CancellationToken ct = default, bool
         progressParser.OnErrorMessage += OnErrorMessageHandler;
         progressParser.OnPostProcessingStart += OnPostProcessingStartHandler;
         progressParser.OnPostProcessingComplete += OnPostProcessingCompleteHandler;
-      
+
         // Command completion
         void OnCommandCompletedHandler(object? s, CommandCompletedEventArgs e) => OnCommandCompleted?.Invoke(this, e);
-        download.OnCommandCompleted += OnCommandCompletedHandler;      
+        download.OnCommandCompleted += OnCommandCompletedHandler;
 
         try
         {
@@ -1847,6 +1891,10 @@ public async Task DownloadBatchAsync(IEnumerable<string> urls, int maxConcurrenc
 
     #endregion
 
+    // ==================================================================================================================
+    // Internal Helpers and Utilities
+    // ==================================================================================================================
+
     #region Helpers
 
     // Get probe runner