In order to stream to multiple pages at the same time, you can crosspost your stream, or select multiple destinations in the Studio, including FB an Youtube.
The number of destinations you can multistream to, depending on your plan:
Free Plan: 1 destination
Pay As You Go Plan: 1 destination
Small Plan: 2 destinations
Medium Plan: 5 destinations
Large Plan: 10 destinations
Enterprise Plan: 20 destinations
Once you selected destinations for the multistreaming and saved it in Settings, you can hover over this icon to check information about streams and their status anytime.
Once your streams are live, you can select a page to interact with users right from the Studio. If you select ALL, then your comment will be published on all the pages where you multistream.
You also might be interested in: