Update app.py

app.py

@@ -86,7 +86,7 @@ async def create_youtube_transcription(youtube_url: str) -> List[langchain_core.
         youtube_docs = loader.load() # this loads the transcript
         return youtube_docs
     except Exception as e:
-        await cl.Message(content=f"failed to load youtube video: {e} Please refresh the page").send() # display the error if we failed to load the youtube video
+        await cl.Message(content=f"Error: {e} Please refresh the page").send() # display the error if we failed to load the youtube video
 
 
 ######## RAG ########