A screen share of your monitor is a picture of a picture. It is scaled to the window, encoded as screen content, and usually re-encoded by a media server before the client sees it. The fix is simple: stop sharing the monitor and put the camera itself in the call.
Make the camera a participant
Feed the camera's clean output into a USB capture device (or use a USB camera directly) on a laptop. On that laptop, open the room link and choose the capture device as the camera. The host admits it from the waiting room. Now it is its own tile, encoded once and sent peer-to-peer to the client.
Tell the client exactly what to do
- Open the link on a laptop or desktop, not a phone, if they are judging detail. No account needed — they use Join.
- Pin the camera tile, then go full-screen.
- Want it bigger? Cast or mirror the browser tab to a TV. There is no Smart TV store app — casting is the path.
- Say what they see: “focus is on the ear” beats “looks soft.”
Protect the feed
Put the camera machine on wired Ethernet, close other apps, and keep it off heavy background uploads. Resolution follows the uplink and the client's hardware; nothing in 4K Chat guarantees 4K on every call. If the client's office network refuses to connect, remember Free has no TURN relay — a phone hotspot usually gets them in.
Next: run a colour and focus check before the first take.