Canon VIXIA HF R800
Canon’s manual gives it no USB webcam mode, so it needs an HDMI capture card. Set Output Onscreen Displays to Off, or its icons go out with the picture.
Connections & full profile →View at Canon ↗Sony ZV-1
Over USB it sends only 720p at 30 fps. For 1080p you need an HDMI capture card and a micro HDMI cable, which Sony sells separately.
Connections & full profile →View at Sony ↗Sony ZV-E10 II
No USB cable, power adapter or HDMI cable comes in the box, and the body-only package has no lens. 4K or 1080p over USB needs a 5 Gbps port and cable; on USB 2.0 it sends 720p.
Connections & full profile →View at Sony ↗Sony HDR-CX405
Sony documents no USB webcam mode, so it needs a capture card, and does not say whether its on-screen icons go out over HDMI: check the picture in OBS before going live. Set Power Save and Demo Mode to Off, or it turns off after about 2 minutes or plays its demo movie on mains power.
Connections & full profile →View at Sony ↗Canon EOS R50
Over USB it sends 1080p at 30 fps, and Canon suggests mains power for long sessions; the PD-E1 adapter, the USB and HDMI cables and a memory card are all sold separately.
Connections & full profile →View at Canon ↗