The Tosca Distributed Execution (DEX) Setup Guide is a comprehensive video guide that provides step-by-step instructions on how to set up and configure distributed execution for Tosca tests. This guide includes detailed information on installing and configuring the necessary components, setting up test configurations, and troubleshooting common issues that may arise during the setup process. By following this guide, users can effectively leverage the power of distributed execution in Tosca to run automated tests more efficiently and effectively across multiple machines or environments.