Some camera manufacturers offer software that uses your mirrorless camera to emulate a webcam without requiring a capture card.
For example, Fujifilm's X Webcam software[1] would allow the author to connect his X-S10 to his PC using a USB-C cable, and use it as a webcam. The downside is X Webcam lacks support for Linux.
For example, Fujifilm's X Webcam software[1] would allow the author to connect his X-S10 to his PC using a USB-C cable, and use it as a webcam. The downside is X Webcam lacks support for Linux.
[1] https://fujifilm-x.com/global/products/software/x-webcam/