Add webRTC integration

source/_integrations/web_rtc.markdown

@@ -0,0 +1,63 @@
+---
+title: WebRTC
+description: Instructions on how to configure the WebRTC integration for Home Assistant.
+ha_category:
+  - Other
+ha_release: '2026.1'
+ha_quality_scale: internal
+ha_domain: web_rtc
+ha_codeowners:
+  - '@home-assistant/core'
+ha_integration_type: system
+---
+
+The **WebRTC** {% term integration %} is an internal integration that provides WebRTC functionality for camera streaming in Home Assistant. It is automatically set up when needed and does not require any manual configuration.
+
+## Advanced configuration
+
+To configure your own <abbr title="session traversal utilities for NAT">STUN</abbr> and <abbr title="traversal using relays around NAT">TURN</abbr> servers, add the following to your {% term "`configuration.yaml`" %} file:
+
+```yaml
+# Example configuration.yaml entry
+web_rtc:
+```
+
+{% configuration %}
+web_rtc:
+  description: Enables the WebRTC integration. Only allowed once.
+  required: true
+  type: map
+  keys:
+    ice_servers:
+      description: List of STUN and TURN server configurations.
+      required: true
+      type: list
+      keys:
+        url:
+          description: STUN or TURN server URLs. This can either be a single URL or a list of URLs.
+          required: true
+          type: string
+        username:
+          description: Username for TURN server authentication.
+          required: false
+          type: string
+        credential:
+          description: Credential for TURN server authentication.
+          required: false
+          type: string
+{% endconfiguration %}
+
+### Configuration example
+
+```yaml
+# Example configuration.yaml entry with custom STUN and TURN servers
+web_rtc:
+  ice_servers:
+    # Add an entry for each STUN or TURN server
+    - url:
+        - "stun:stun.example.com:19302"
+        - "stun:stun2.example.com:12345"
+    - url: "turn:turn.domain.com"
+      username: "username"
+      credential: "abc123"
+```