**Package:** yt-dlp
**Current Version in Replit Nix:** 2024.05.27 (from May 2024)
**Latest Version:** 2025.01.03 (current)
**Nix Package:** https://search.nixos.org/packages?query=yt-dlp
**Issue:**
The outdated yt-dlp version cannot download YouTube videos due to YouTube's updated anti-bot protections. Getting consistent "nsig extraction failed" and "HTTP Error 403: Forbidden" errors.
**Why This Update Is Critical:**
- yt-dlp requires frequent updates to keep pace with YouTube's anti-bot measures
- The current 5-month-old version is blocked by YouTube's current protections
- This breaks essential transcription workflows for content verification applications
**Use Case:**
Building an AI-powered content verification platform that transcribes YouTube videos without captions. The workflow is:
1. youtube-dl-exec extracts direct audio URL ✅
2. AssemblyAI transcribes from that URL ❌ (fails because YouTube's signed URLs block third-party access)
3. Fallback: yt-dlp downloads audio locally → AssemblyAI transcribes ❌ (fails with 403 due to outdated version)
**Error Example:**
WARNING: [youtube] VwjxVRfUV_4: nsig extraction failed
ERROR: unable to download video data: HTTP Error 403: Forbidden
**Request:**
Please update yt-dlp to the latest version (2025.01.03 or newer) in Replit's Nix package cache.
**Technical Details:**
- System: Replit Nix environment
- Command used: `yt-dlp -x --audio-format mp3 <youtube_url>`
- Version check: `yt-dlp --version` shows `2024.05.27`