With StreamSpot's syndication into Restream.io any channel enabled on your Restream account will be published to from your StreamSpot broadcast.
Independent channels will need to be set up and turned on from within your Restream account.
To set up an account go to https://restream.io/
Once logged in you can add and manage the various channels available. For an article from restream on how to add additional channels please review this article.
When syndicating a broadcast from StreamSpot that broadcast will go to all active channels in your Restream portal.
Below is a link to the restream Help Center if you are seeking more information.