This is a mockup of my ideal mini presentation switcher.
The main feature this switcher provides is the ability to output the nice layout of a presentation with the slides scaled and the speaker video cropped, while also passing through both the camera and presentation video for other purposes like sending to Zoom or projecting in-house.
Play around with the input selection buttons and try changing the layout using the slider too!
If the buttons don't do anything at first, try reloading the page!Inputs
The internal memory can store two images, which can be captured from the HDMI input 2 source. This lets you set up a title card on a computer via Keynote/Powerpoint, then capture it in the still memory so you can cut to the still graphic for the livestream or recording. The other internal memory slot can store a graphic that is used as the background of the side by side layout.
The USB-C output is switchable between the input 1 passthrough or program output. You'd use passthrough mode to send the camera to Zoom while still being able to record the side by side layout. You could use the USB-C program out to stream via OBS.