revert to google STUN

tools/webcam.py

@@ -3,8 +3,7 @@ from streamlit_webrtc import webrtc_streamer, WebRtcMode, RTCConfiguration
 
 
 RTC_CONFIGURATION = RTCConfiguration(
-    {"iceServers": [{"urls": ["turn:openrelay.metered.ca:80"], username: 'openrelayproject',
-            credentials: 'openrelayproject'}]}
+    {"iceServers": [{"urls": ["stun:stun.l.google.com:19302"], }]}
 )