Send a second video using Full-screen Projector
- Right click on the Preview, "Full-screen Projector (Preview)" menu item.
- Choose the second screen from the list.
Send a second audio using Monitor
- Go Settings > Audio. In Advanced, set the Monitoring Device to the second screen.
- Go to Advanced Audio Properties (in the Audio mixer panel click the Cog, or the three dots button next to an audio source).
- Choose "Monitor and Output" in the Audio Monitoring column for the correct audio source.