docs: add video examples for IdP-initiated SSO in changelog and documentation

Author: marcklingen

pages/changelog/2025-11-04-idp-initiated-sso.mdx

@@ -4,6 +4,7 @@ title: IdP-Initiated SSO Support
 description: Langfuse now supports IdP-initiated SSO, allowing users to start authentication directly from their identity provider (e.g., Okta, Azure AD, Keycloak)
 badge: Launch Week 4 🚀
 author: Marc
+ogVideo: https://static.langfuse.com/docs-videos/idp-initiated-sign-in-16-9.mp4
 ---
 
 import { ChangelogHeader } from "@/components/changelog/ChangelogHeader";

pages/self-hosting/security/authentication-and-sso.mdx

@@ -249,6 +249,16 @@ Configure `AUTH_HTTPS_PROXY` or `AUTH_HTTP_PROXY` to use a proxy for SSO provide
 
 Langfuse supports **IdP-initiated SSO** (Identity Provider-initiated Single Sign-On), where users can start the SSO flow directly from their identity provider (e.g., Okta, Azure AD, Keycloak, etc.) instead of starting from Langfuse.
 
+_Example of IdP-initiated SSO authentication flow (Okta):_
+
+<Video
+  src="https://static.langfuse.com/docs-videos/idp-initiated-sign-in.mp4"
+  aspectRatio={1812 / 1080}
+  title="IdP-Initiated SSO Authentication Flow"
+  className="max-w-xl"
+  gifStyle
+/>
+
 To enable IdP-initiated SSO, configure your identity provider to redirect users to:
 
 ```