In order to insert ads into your Stream Monkey content, first you'll need a subscription to a third party service.
To insert your ads into your Stream Monkey content, you'll go to the Ads tab and click to create a new ad. You will connect your ad server, then choose where in the video playback you would like your ad to appear.
Each video has the ability to insert ads, as do channels. You can also apply an ad to a Live Stream, but only as a preroll option.