remove youtube from searches

rag.py

@@ -28,7 +28,7 @@ async def search(query: str, top_k: int = 5) -> list:
     if not query:
         raise ValueError("Query cannot be empty.")
 
-    web_search = await google(q=f"{query} -filetype:pdf", results=2)
+    web_search = await google(q=f"{query} -filetype:pdf -site:youtube.com", results=2)
 
     _index_links([result["link"] for result in web_search["organic"]])