Macbook Pro Display

I have been trying to figure out how to display my MacBook Pro display onto the USB input of Webcaster X2. I would like to be able to display my desktop to show illustrations and info while streaming in the “Picture in Picture” option. Not sure if this possible currently.

I am currently able to display from Thunderbolt 3 Type-C dongle with HDMI output. I also have a Blackmagic Ultra Studio Mini Recorder with HDMI Input that contains a Thunderbolt 2.0 output.

here are links to the adapters I currently have:
USB 3 (Thunderbolt 3.0 Type-C)

Blackmagic video converter