This page details how to use TubePress for Wix. It assumes that you already have a Wix website up and running; if not, Wix offers excellent documentation to get you started. TubePress is available to Wix.com as an "app" in the Wix App Market. As such, Wix provides detailed documentation on how to use the App Market.
For the sake of completeness, here's how to add TubePress to your site.
tubepressand hit enter.