Update app.py

app.py

@@ -19,6 +19,7 @@ async def create_youtube_transcription(youtube_url: str) -> List[langchain_core.
     Returns:
         List[langchain_core.documents.Document]: A list of documents containing the youtube transcription
     """
+    await cl.Message(content=f"Hi").send()
     try:
         loader = YoutubeLoader.from_youtube_url(
             youtube_url, add_video_info=False