Update app.py

app.py

@@ -66,8 +66,27 @@ def get_best_formats_with_fallback(data: dict, requested_quality: int):
         raise ValueError("Could not find suitable video and/or audio streams from the Info API.")
     return video_url, audio_url
 
+
+
 def run_ytdlp_download(url: str, out_path: Path):
-    ydl_opts = {'outtmpl': str(out_path), 'quiet': True, 'noprogress': True}
+    """
+    Runs a single yt-dlp download using the high-speed 'aria2c' downloader.
+    """
+    ydl_opts = {
+        'outtmpl': str(out_path),
+        'quiet': True,
+        'noprogress': True,
+        # --- SPEED OPTIMIZATION ---
+        # Use the aria2c external downloader for multi-connection downloads
+        'external_downloader': 'aria2c',
+        # Arguments to pass to aria2c for maximum speed
+        'external_downloader_args': [
+            '--min-split-size=1M',
+            '--max-connection-per-server=16',
+            '--max-concurrent-downloads=16',
+            '--split=16'
+        ],
+    }
     with YoutubeDL(ydl_opts) as ydl:
         ydl.download([url])