langgraph-wip/agent_tools/youtube_tools.py

from langchain_core.tools import tool
from youtube_transcript_api import YouTubeTranscriptApi


@tool
def youtube_transcript(url: str) -> str:
    """
    Get transcript of YouTube video.
    Args:
        url: YouTube video url in ""
    """    
    video_id = url.partition("https://www.youtube.com/watch?v=")[2]
    transcript = YouTubeTranscriptApi.get_transcript(video_id)
    transcript_text = " ".join([item["text"] for item in transcript])
    return {"youtube_transcript": transcript_text}