EZStream is the easiest way to stream your device camera in any web browser. Tap on the screen to toggle your IP address and put that address in your browser.
A red dot in the upper right corner of EZStream indicates that someone is watching your stream.Beware, this only works on a local network.
It is an application I've made a long time ago when I was trying to learn Swift and iOS development. I would probably do it differently now :-)
If anyone is interested, here is the GitHub repo. The major challenge was to make a MJPEG stream and a web server on the device.