---
title: Introduction to the series
description: Overview of the Durable Objects video series.
image: https://developers.cloudflare.com/cf-twitter-card.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/learning-paths/llms.txt  
> Use this file to discover all available pages before exploring further.

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# Introduction to the series

* [ Watch this episode ](#tab-panel-6738)
* [ Series overview ](#tab-panel-6739)

In this episode, we present an overview of the series, discuss its underlying architecture, and access resources to set up the project locally.

[ Watch Episode 1: Introduction to the series ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/introduction-to-series-1/) We present an overview of the series, discuss its underlying architecture, and access resources to set up the project locally. 

[ Watch Episode 2: What are Durable Objects? ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/what-are-durable-objects-2/) We show how Durable Objects work and start building a video call app together. 

[ Watch Episode 3: Create a serverless websocket 'backend' ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/serverless-websocket-backend-3/) We create a WebSocket backend using serverless technology, making the process simpler than ever before. 

[ Watch Episode 4: Real-time messaging with WebSockets ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/real-time-messaging-with-websockets-4/) We learn how to route and broadcast incoming messages from WebSocket connections and implement error handling such as closed WebSocket connections. 

[ Watch Episode 5: Build the app frontend and UI ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/build-the-app-frontend-5/) We configure the frontend starter code, connect to Durable Objects using a call room ID, and display a local video preview. 

[ Watch Episode 6: Make and answer WebRTC calls ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/make-answer-webrtc-calls-6/) We expand the frontend functionality by adding functionality for making and answering WebRTC video calls. 

[ Watch Episode 7: Deploy your video call app ](https://developers.cloudflare.com/learning-paths/durable-objects-course/series/deploy-your-video-call-app-7/) In this final episode, we configure the remaining functionalities. By the end, your app will be fully functional and ready for deployment. 

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