Please note that in order for you to import an overlay from a different 3rd Party Service, you will need to subscribe to the premium plan. Please take a look at this article on how to upgrade.
The Pixel Chat site has lots of great overlays for you to choose from that can integrate with your Twitch channel. Their Closed Captioning (Pixel-CC) and Give Away (Pixel-Give) overlays are popular among Pixel Chat users.
Once you’ve got your overlays setup in Pixel Chat you’re ready to add it to your Lightstream project as a layer.
Note: Some overlay options are Pixel-Pro only.
First, you’ll need to copy the direct URL for the Pixel Chat overlay itself. You can get this from the Pixel Chat dashboard Overlays section by hovering over the icon of the overlay you want and selecting the “Copy Link” option.
Then you will need to head over to the Produce section in your Lightstream Studio, scroll over until you see an overlay section. Click overlay and paste the link previously and click save.