You can preview your stream through the Stream Monkey dashboard, without embedding it on your website. Select Live Monitor on the left navigation bar. You will see a list of your streams in the drop down menu at the top. Select the stream that you would like to view, and it will show up in the player window directly below. If you have our live transcoding service, you'll also be able to see some viewer and settings stats from your stream, in real time.
You can also go to the Sharing tab, and find a direct link to the player so you can test it out in your browser.