Update app.py

app.py

@@ -104,7 +104,7 @@ def download_youtube_audio(url, method_choice):
         logging.error(f"Error downloading using {method_choice}: {str(e)}")
         return None
 
-ef yt_dlp_method(url):
+def yt_dlp_method(url):
     """
     Downloads YouTube audio using yt-dlp and saves it to a temporary file.