diff --git a/Download.cs b/Download.cs
index 33f6201..d10bcd1 100644
--- a/Download.cs
+++ b/Download.cs
@@ -68,7 +68,7 @@ public async Task Start()
             VideoData? videoData = await FetchVideoInfoAsync(ytdl, optionSet);
             if (null == videoData) return;
 
-            outputFilePath = CalculatePath(videoData?.Title, videoData?.UploadDate, videoData.ID);
+            outputFilePath = CalculatePath(videoData?.Title, videoData?.UploadDate, videoData?.ID);
 
             bool downloadSuccess = await DownloadVideoAsync(ytdl, optionSet);
             if (!downloadSuccess) return;
@@ -87,7 +87,8 @@ public async Task Start()
             Log.Information(outputFilePath);
             successed = true;
         }
-        catch (Exception e) {
+        catch (Exception e)
+        {
             Log.Error("vvvvvvv");
             Log.Error(e.Message);
             Log.Error("^^^^^^^");
@@ -231,7 +232,7 @@ private async Task<IConversionResult> CutWithFFmpegAsync(string inputPath, strin
     /// <param name="title">影片標題，用做檔名</param>
     /// <param name="date">影片日期，用做檔名</param>
     /// <returns></returns>
-    private string CalculatePath(string? title, DateTime? date, string videoId)
+    private string CalculatePath(string? title, DateTime? date, string? videoId)
     {
         title ??= "";
         // 取代掉檔名中的非法字元
@@ -246,7 +247,7 @@ private string CalculatePath(string? title, DateTime? date, string videoId)
 
         date ??= DateTime.Now;
 
-        string newPath = Path.Combine(outputDirectory.FullName, $"{date:yyyyMMdd} {title} ({videoId}) [{start}_{end}].mp4");
+        string newPath = Path.Combine(outputDirectory.FullName, $"{date:yyyyMMdd} {title} ({videoId ?? id}) [{start}_{end}].mp4");
 
         Log.Debug("Calculate output file path as {newPath}", newPath);
         return newPath;
diff --git a/Form1.cs b/Form1.cs
index ddeaecd..fac228a 100644
--- a/Form1.cs
+++ b/Form1.cs
@@ -92,7 +92,7 @@ private void button_start_Click(object sender, EventArgs e)
         Settings.Default.Format = format;
 
         string browser = comboBox_browser.Text;
-        if (string.IsNullOrEmpty(browser) 
+        if (string.IsNullOrEmpty(browser)
             || browser == resources.GetString("comboBox_browser.Items"))
         {
             browser = "";
@@ -313,7 +313,7 @@ void SetUI(string id, float start, float end)
                 textBox_end.Text = end.ToString();
             }
         }
-        catch(Exception ex)
+        catch (Exception ex)
         {
             Log.Error(ex.Message);
         }
diff --git a/Properties/PublishProfiles/ClickOnceProfile.pubxml b/Properties/PublishProfiles/ClickOnceProfile.pubxml
index 7e52da9..b49e986 100644
--- a/Properties/PublishProfiles/ClickOnceProfile.pubxml
+++ b/Properties/PublishProfiles/ClickOnceProfile.pubxml
@@ -5,7 +5,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
 <Project>
   <PropertyGroup>
     <ApplicationRevision>0</ApplicationRevision>
-    <ApplicationVersion>1.7.2.0</ApplicationVersion>
+    <ApplicationVersion>1.8.0.0</ApplicationVersion>
     <BootstrapperEnabled>True</BootstrapperEnabled>
     <Configuration>Release</Configuration>
     <CreateDesktopShortcut>True</CreateDesktopShortcut>
diff --git a/README.md b/README.md
index 409586b..6cb8696 100644
--- a/README.md
+++ b/README.md
@@ -39,9 +39,14 @@ Input [the format](https://github.com/yt-dlp/yt-dlp#format-selection) such as `3
 > Re-encoded is needed after cutting the video. Please read the details below.
 
 **I18n 多國語系**\
-我只做了中文介面\
+我做了中文介面\
 I only speak Chinese. Give me PR if you make more languages!
 
+**It can accept any yt-dlp supported site.**\
+I only support Youtube, but this application can theoretically be used on [any site supported by yt-dlp](https://github.com/yt-dlp/yt-dlp/blob/master/supportedsites.md).\
+The actual situation depends on the video format and whether ffmpeg can index it correctly, but it's still worth a try.\
+For reference, I have had success with Youtube, Twitch, and niconico.
+
 ## Install
 
 Get the latest release