Very similar setup here: Sony a5100 + Samyang 30 + Elgato Cam Link 4k and a usb-powered dummy battery. This setup has been rock-solid for over a year now, and I run it all day, every day.
Also useful is Sony's remote control, for engaging/disengaging autofocus without reaching for the camera. The a5100 has a useful flip-up screen, where I can see myself.
Before that, I was running a RasPi Zero with a HQ camera module and a C-mount lens as a webcam. That worked well, too. Better image quality than any of my colleagues, but a long shot from the Sony, obviously.
Also useful is Sony's remote control, for engaging/disengaging autofocus without reaching for the camera. The a5100 has a useful flip-up screen, where I can see myself.
Before that, I was running a RasPi Zero with a HQ camera module and a C-mount lens as a webcam. That worked well, too. Better image quality than any of my colleagues, but a long shot from the Sony, obviously.