Streamlabs OBS is a forked version of OBS that is focused around themes and customization. It is free but you can upgrade to Streamlabs Prime for $12/month.
Make sure you've got a Mic and Webcam setup to live stream with.
Navigate to Content > Live Events to first create a live event.
If you haven't created a live event before make sure to check out our help article on that.
On the Stream tab you're going to see a Stream URL and a Stream Key. These are needed for Streamlabs OBS to link with Uscreen.
Unlike a few other streaming services, your stream key is going to be unique to each live event.
In Streamlabs OBS, navigate to Settings in the bottom left and click the Stream tab. Set the Stream Type to Custom Streaming Services and then you can paste in your Stream URL and Stream Key below.
On the OBS control panel, select Go Live
Now Uscreen should be receiving your stream from Streamlabs OBS but before you go live make sure you give your Live Event a test.
Again, under the Stream tab, click on Test Player. If you see video/content from OBS you are ready to go live.
Just note, that you sometimes have to wait a good 30 seconds to see your content.
If ready, click Go Live and your live event has begun!