Update app.py

app.py

@@ -8,6 +8,7 @@ import gradio as gr
 import numpy as np
 import faiss
 import yt_dlp
+from huggingface_hub import hf_hub_download
 
 embed_html1 = '<iframe width="560" height="315" src="https://www.youtube.com/embed/'
 embed_html2 = '" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>'