Welcome Maria.
You probably cannot stream video to others using the phone's Camera.
What have you tried using the WebViewer? Share some Blocks please.
Possibly the information here would help if you have an Rtsp stream from somewhere other than the Android's Camera https://flashphoner.com/7-ways-to-stream-rtsp-on-the-page/ . You might be able to use one of these techniques using an imbedded html.
This discussion might be what you want to do Camera grove avec app . It discusses using an ip camera connected to an arduino.