WebRTC · Video guide
Debugging WebRTC ICE Candidate Errors – Fiddle of the Month
The player loads only when you choose Watch here. Playback uses YouTube’s privacy-enhanced embed; YouTube processes playback data.
Why this is useful
Compares a STUN lookup warning with a TURN authentication failure. The useful question is whether the expected candidates were gathered, not whether the console contains any error.
Applicability
Version-specificMarch 2025 browser behavior. Verify event support in the browsers you deploy.
Keep in mind
- Error 701 is not exclusively a DNS failure. Interpret its text, affected server and the candidates that actually appeared.
- An initial TURN 401 on the wire can be a normal challenge; it is not the same evidence as the demonstration’s final credential error.
- Gathering a candidate does not prove media connectivity. Keep production TURN credentials out of public demonstration pages.
Before you watch
Read the linked introduction, then use the video to reinforce the explanation.
Editorial review Sep 7, 2026. Review used the complete available transcript and primary references; audio and screen readability remain unverified.