Can I bring the hdmi feed from the camera directly into my Mac mini Thunderbolt 4 with a HDMI to Thunderbolt adapter?
You can but keep in mind, all HDMI connections are either an input or an output. So a lot of the TB4 to HDMI adapters are really meant to be HDMI outputs for hooking up an additional monitor. Those would not work. You would need an HDMI capture device to bring in the HDMI feed as an input to the computer. We generally recommend the captures devices from a company called "Magewell"