Every application comes with simple code which creates a button that, once clicked, will launch a stream of the application. You can find this simple code by going to the Applications section of the X.IO site and clicking on the green gear of your desired application.
A small window will open with code. Copy that code and paste it in the source code for your web page. (There is more code then is displayed in the window, so make sure you copy it all.)
For more detailed instructions on embedding and customizing your code, look through the X.IO documentation. (If you choose to customize your code remember that your application ID can be found in the Settings page of your application.)
If you want to allow access to your application to all users, you can do so by allowing anonymous access to the application in the Application Setting page.
To get to the settings page, go to the Applications page and select the application you want to make changes to, by click on one of the blue names.