Update Video links on Firebase page (#9955)

Fixes #9953

src/data-and-backend/firebase.md

@@ -3,36 +3,57 @@ title: Firebase
 description: How to use Firebase and Firestore with Flutter.
 ---
 
+{% include docs/yt_shims.liquid %}
+
+## Introduction
+
 Firebase is a Backend-as-a-Service (BaaS) app development platform
 that provides hosted backend services such as a realtime database,
 cloud storage, authentication, crash reporting, machine learning,
 remote configuration, and hosting for your static files.
 
-Firebase supports Flutter. For more information, see:
+## Flutter and Firebase resources
+
+Firebase supports Flutter. To learn more,
+check out the following resources.
+
+### Documentation
 
-* The [Firebase plugins][] page
 * [Getting started with Firebase and Flutter][started]
-* [Get to know Firebase for Flutter][workshop] video workshop
-  based on the codelab
-* [Get to know Firebase for Flutter][codelab1] codelab
-* [Use Firebase to host your Flutter app on the web][article]
+* [Firebase plugins][]
+
+### Blog Posts
+
+[Use Firebase to host your Flutter app on the web][article]
+
+### Tutorials
+
+Get to know Firebase for Flutter
+* [tutorial][codelab1]
+* [video workshop][workshop]
+
+## Flutter and Firebase community resources
+
+The Flutter community created the following useful resources.
+
+### Blog Posts
+
+[Building chat app with Flutter and Firebase][chat app]
 
-Also, the Flutter community has created docs and
-videos that you might find useful. Here are a few:
+### Videos
 
-* [Building chat app with Flutter and Firebase][chat app]
-* [Using Firestore as a backend to your Flutter app][video] (video)
-* [Live Coding Firebase Authentication with Flutter][video2] (video)
-* [Flutter & Firebase Auth 01][video3] (video)
-* [Flutter: Firebase Tutorial Part 1 - Auth and Sign in][video4] (video)
+* [Using Firestore as a backend to your Flutter app][video]
+* [Live Coding Firebase Authentication with Flutter][video2]
+* [Flutter & Firebase Auth 01][video3]
+* [Flutter: Firebase Tutorial Part 1 - Auth and Sign in][video4]
 
 [article]: {{site.flutter-medium}}/must-try-use-firebase-to-host-your-flutter-app-on-the-web-852ee533a469
 [chat app]: {{site.medium}}/flutter-community/building-a-chat-app-with-flutter-and-firebase-from-scratch-9eaa7f41782e
 [codelab1]: {{site.codelabs}}/codelabs/firebase-get-to-know-flutter
 [Firebase plugins]: {{site.firebase}}/docs/flutter/setup#available-plugins
 [started]: {{site.firebase}}/docs/flutter/setup
-[video]: {{yt-watch}}?v=DqJ_KjFzL9I&t=38s
-[video2]: {{yt-watch}}?v=OlcYP6UXlm8
-[video3]: {{yt-watch}}?v=u_Lyx8KJWpg
-[video4]: {{yt-watch}}?v=13-jNF984C0
-[workshop]: {{yt-watch}}?v=4wunbF29Kkg
+[video]: {{yt-watch}}/DqJ_KjFzL9I&t#38s
+[video2]: {{yt-watch}}/OlcYP6UXlm8
+[video3]: {{yt-watch}}/u_Lyx8KJWpg
+[video4]: {{yt-watch}}/13-jNF984C0
+[workshop]: {{yt-watch}}/4wunbF29Kkg