Now owners of high-end Fujifilm mirrorless cameras can use it as a webcam! Using new software introduced by Fujifilm, the live feed from all GFX and many X-series cameras can be streamed like a webcam. This will turn any compatible camera into the highest-quality webcam available with cinematic look and flexibility that comes from interchangeable lenses.
At this time, the software is specific to Windows 10 64-bits only. It supports the GFX 100, GFX 50S, GFX 50R, X-H1, X-Pro2, X-Pro3, X-T2, X-T3 and the new flagship Fujfiilm X-T4. These cameras connect via USB. Detailed instructions are provides on the Fujifilm Webcam Support page. Be sure to follow those instructions carefully because some things, like setting to camera into Photo mode, are not intuitive considering the camera is outputting a live video stream.