TranscriptListFetcher Add this line

app.py

@@ -8,6 +8,7 @@ if not os.environ.get("GOOGLE_API_KEY"):
 
 import gradio as gr
 from youtube_transcript_api import YouTubeTranscriptApi
+from youtube_transcript_api._api import TranscriptListFetcher  # ✅ Add this line
 from langchain_core.prompts import PromptTemplate
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_community.vectorstores import FAISS