diff --git a/index.js b/index.js
index f967d3a..69331c2 100644
--- a/index.js
+++ b/index.js
@@ -23,13 +23,13 @@ var uploads = multer({ dest: 'uploads/' })
 
 const characters = "abcdefghijklmnopqrstuvwxyz!@$%^*()[]_-=+ "
 
-process.on('uncaughtException', (err, origin) => {
-  fs.writeSync(
-    process.stderr.fd,
-    `Caught exception: ${err}\n` +
-    `Exception origin: ${origin}`,
-  );
-});
+// process.on('uncaughtException', (err, origin) => {
+//   fs.writeSync(
+//     process.stderr.fd,
+//     `Caught exception: ${err}\n` +
+//     `Exception origin: ${origin}`,
+//   );
+// });
 
 app.use(bodyParser.urlencoded({ extended: false }))
 
@@ -139,26 +139,32 @@ app.get("/download", async (req, res) => {
     ffmpegProcess.stdio[1].pipe(res)
 
   } else {
-    var video = ytdl(url, { filter: 'videoandaudio', quality: quality })
+    if (format != 'mp4') {
+      var video = ytdl(url, { filter: 'videoandaudio', quality: quality, highWaterMark: 1 << 25 })
 
-    const ffmpegProcess = cp.spawn(ffmpeg, [
-      '-i', `pipe:3`,
-      '-preset', preset,
-      '-f', format,
-      '-loglevel', 'error',
-      '-'
-    ], {
-      stdio: [
-        'pipe', 'pipe', 'pipe', 'pipe', 'pipe',
-      ],
-    })
-
-    video.pipe(ffmpegProcess.stdio[3])
-
-    res.setHeader('Content-Disposition', `attachment; filename="${filename}.${formats[format] || format}"`);
-    // res.setHeader('Content-Length', fs.readFileSync(dest).length)
-
-    ffmpegProcess.stdio[1].pipe(res)
+      const ffmpegProcess = cp.spawn(ffmpeg, [
+        '-i', `pipe:3`,
+        '-preset', preset,
+        '-f', format,
+        '-loglevel', 'error',
+        '-'
+      ], {
+        stdio: [
+          'pipe', 'pipe', 'pipe', 'pipe', 'pipe',
+        ],
+      })
+  
+      video.pipe(ffmpegProcess.stdio[3])
+  
+      res.setHeader('Content-Disposition', `attachment; filename="${filename}.${formats[format] || format}"`);
+      // res.setHeader('Content-Length', fs.readFileSync(dest).length)
+  
+      ffmpegProcess.stdio[1].pipe(res)
+    } else {
+      var video = ytdl(url, { filter: 'videoandaudio', quality: quality, highWaterMark: 1 << 25 })
+      res.setHeader('Content-Disposition', `attachment; filename="${filename}.${formats[format] || format}"`);
+      video.pipe(res)
+    }
   }
 
 })