# About the Wowza Video JavaScript SDK for Real-Time Streaming at Scale Learn about the Wowza Video™ JavaScript SDK for Real-Time Streaming at Scale. ## About the SDK With Real-Time Streaming at Scale in Wowza Video, you can deliver interactive live streams with as little as half-second latency to audiences of up to a million viewers. The Wowza Video JavaScript SDK for Real-Time Streaming at Scale is used for developing browser-based broadcasting of real-time streams to Wowza Video and for creating playback applications for large audiences. If you're building an application for real-time streaming that leverages the Wowza Video service, the SDK accelerates the development of interfaces for publishing and viewing real-time streams. You must obtain a license for Real-Time Streaming at Scale to add this capability to your new or existing account. Contact us for more information. ## Get started To get started using the SDK, complete the following steps: 1. Install the SDK using one of these methods: * Add the following script within the **** of your publisher and viewer HTML pages: ```html ``` * Run the following shell command to install the NPM package to your dependencies if you build an application with Node.js: ```bash npm i --save @wowzamediasystems/sdk-rts ``` 2. Use the publisher and viewer sample code under **Basic usage** in the SDK reference to create basic publishing and viewing interfaces for real-time streams. * **Publisher example** – Start streaming to a real-time stream in Wowza Video from a browser. * **Viewer example** – Play the real-time stream from a browser. In addition to using the SDK, you need to create a real-time stream in Wowza Video via the REST API or from the UI. Details of the real-time stream must be included in the code of your publisher and viewer interfaces to integrate the SDK with Wowza Video. For more information about using the SDK and Real-Time Streaming at Scale, see the following resources. ## SDK documentation Learn more about using the SDK to develop your publishing and viewing solutions for Real-Time Streaming at Scale with these resources. * JavaScript SDK reference and examples * Deliver real-time streams with Wowza Video * [Deliver real-time streams with the Wowza Video REST API](/docs/wowza-video/guides/video-source/encoder-camera/deliver-real-time-streams)