Update app.py

app.py

@@ -3,6 +3,7 @@ import os
 
 from langchain_google_genai import GoogleGenerativeAIEmbeddings, ChatGoogleGenerativeAI
 from youtube_transcript_api import YouTubeTranscriptApi
+from langchain.schema import Document
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_community.vectorstores import FAISS
 from langchain.chains import LLMChain