Below is a link to a Raspbian-based image useful for Audio/Video Conferences over the web entirely hosted by a Raspberry Pi 3. To use it, just flash the image file to your SD card, boot and connect to the internal web server at http://yourrpi with your PC/Smartphone/tablet browser.
This allows to interconnect as many PC, Tablets, Smart Phones and other Rpi's as you want with your Rpi. No external server is accessed or required in the infrastructure, as everything runs on the Raspberry Pi itself. NO CONFIGURATION IS NECESSARY. The only requirement is that you have an official camera board connected to the Rpi; the USB microphone is optional. Audio and Video is bidirectional from/to any participant (each direction is optional). Participants are automatically rendered onto the HDMI screen attached to the Rpi (if present). Audio goes out through the speakers.
Once you are on the home page, just type your name and click Start to make your Rpi join the conference room on localhost, Stop to leave. You can also join/leave a room hosted on another server (i.e. on another Rpi's) if you want to.
The image can be downloaded from here:
https://drive.google.com/open?id=0BxgkH ... W5tMkZkem8