To stream to YouTube, you will first need to setup your stream on YouTube.
To do this, click on Go live in the top, right corner of the homepage.
On the next page, you will want to select Streaming software from the two options.
Once selected, you will gain access to your Stream URL and Stream Key.
These can be pasted into the YouTube slot in Riverside.
On the stream page in YouTube, you can also toggle the settings to use a delay, select latency settings, etc.
Once all information is entered into Riverside, make sure the toggle is enabled. The stream will now initiate once the recording button has been selected in your studio.