Comment by delta_p_delta_x

Without loss of generality, the USB spec doesn't matter. The overwhelming majority of dedicated cameras are not set up to supply high-quality video output through their USB ports. Mass storage definitely and MTP, maybe, but video out? No, and even if you get it, it is badly nerfed. The industry standard is HDMI capture, or writing to disks in slots—whether SD, CF Express, or even M.2 NVMe.

This entire comment section is a massive storm in a teacup by photography and AV amateurs who don't know the ins and outs of AV work flows and assume that stuff should just work the way they want it to.