Single file Python server for a YouTube transcript API

t.py

cat /tmp/t.py
# /// script
# requires-python = ">=3.12"
# dependencies = [
#     "flask",
#     "youtube-transcript-api",
# ]
# ///

from flask import Flask, request, jsonify, Response
from youtube_transcript_api import YouTubeTranscriptApi, NoTranscriptFound, TranscriptsDisabled

app = Flask(__name__)

@app.route('/t')
def get_transcript():
    video_id = request.args.get('v')
    fmt = request.args.get('format', 'json')
    if not video_id:
        return jsonify({'error': 'Missing video id parameter (v)'}), 400
    try:
        transcript = YouTubeTranscriptApi.get_transcript(video_id)
        if fmt.lower() == 'markdown':
            # Combine text segments into markdown paragraphs
            texts = [entry['text'] for entry in transcript]
            md = "\n\n".join(texts)
            return Response(md, mimetype='text/markdown')
        # default JSON response
        return jsonify(transcript)
    except NoTranscriptFound:
        return jsonify({'error': 'No transcript found for this video'}), 404
    except TranscriptsDisabled:
        return jsonify({'error': 'Transcripts are disabled for this video'}), 403
    except Exception as e:
        return jsonify({'error': str(e)}), 500

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=1206)