Update app.py

app.py

@@ -81,8 +81,10 @@ def download_audio_from_youtube(youtube_url, output_path='.', cookies_file='cook
 
     with youtube_dl.YoutubeDL(ydl_opts) as ydl:
         info_dict = ydl.extract_info(youtube_url, download=True)
-        # Force replace with .wav
+        # force replace with .wav because webm is not supported by librosa
         audio_file = ydl.prepare_filename(info_dict).replace('.webm', '.wav')
+    if os.path.exists('cookies.txt'):
+        os.remove('cookies.txt')
     return audio_file
 
 def segment_audio(audio, sr, segment_duration):