The same link, a different building
A phone becomes a camera by opening a link. Nothing installs, nothing pairs, nothing is configured... it joins.
The interesting part is that the link does not care where the phone is. Same room, same building, or somewhere else entirely. A camera at the back of the hall and a camera in another town join the same way.
That was not really the point when it was built... the point was avoiding an app install. But it turns out to solve a set of problems nobody was shopping for a solution to.
What it is actually for
The person who cannot travel. A speaker who is unwell, abroad, or simply somewhere else. They join as a camera. They appear in the production the way any other camera does... you can cut to them, put them beside something else, put their name under them. They are a participant rather than a video call being pointed at.
The overflow venue that is genuinely elsewhere. Not the hall next door... a different site, contributing rather than only receiving. A greeting from the other congregation, a report from a second location, a person at a different building being part of the same event.
The outside broadcast nobody would fund. Something happening away from the venue that is part of the day: a baptism at a river, a groundbreaking on a site, a team at an event across town. Historically this needed a crew and a satellite truck. Now it needs a volunteer with a phone and a connection.
Coverage of a space you cannot cable to. Sometimes "the far end of town" is really "the far end of a building where nobody is running cable." Same solution, much shorter distance.
Being honest about the constraint
This depends entirely on the connection at the other end, and that is worth stating plainly because it is where the disappointment happens.
A phone sending video needs steady upload from wherever it is standing. A venue you control has a network you can test and improve. A hotel room, a hospital, a house, a field... you have whatever they have, and you find out on the day.
Practical consequences:
Test from the actual location, at the actual time. Not from your office. Not the day before at a different hour. Networks are busy at different times, and the test that matters is the one done where and when the real thing happens.
Expect lower quality than a local camera, and plan for it. A remote feed will usually be softer. That is fine if you have decided in advance that it is fine... a slightly soft picture of the person who could not be there is enormously better than their absence.
Have a fallback. If the connection fails mid-segment, what happens? A pre-recorded version, a still with their audio, a graceful "we'll come back to that." Decide before, not during.
Record at their end too if it matters. For anything you cannot repeat, a local recording on their device is insurance the network cannot take away.
The thing that makes it usable
The reason this works for volunteer teams is that the person at the far end does not need to know anything.
They receive a link. They open it. They point the phone. Everything else happens where the production is... framing decisions, when they are on screen, what appears beside them, whether they are recorded.
That matters because the remote person is frequently the least technical participant. A guest speaker, a family member, someone at a site with no AV knowledge. Any solution that requires them to install, configure or troubleshoot fails at the first step, and it fails at a moment when nobody can help them.
"Tap this link and hold the phone up" is a small enough instruction to survive a phone call.
What it does not replace
It is not a video conferencing platform. There is no gallery view, no chat, no round-table of participants. It is a camera source that happens to be far away.
For a discussion between several remote people, use something built for that. For a contribution from somewhere else, arriving into a production as a camera, this is a better shape... because it goes through the same path as every other camera, which means it inherits everything else the production does. The recording keeps it. The stream carries it. The lower third works. The second screen shows it.
The underrated version
The use nobody predicts, and the one I hear about most: a camera position in the same building that was simply hard to reach.
The balcony with no cable run. The side room. The position that would need an hour of gaffer tape and a cable nobody wants to trip over.
It is not glamorous and it removes a real, recurring irritation. Sometimes "over the internet" is the easiest way to get a signal thirty feet across a room with a wall in it.