[sifonr]

You might want to try sifonr.com

Select "Make globally unique", check "Protect stream publishing" and enter an optional passphrase. You then will be provided with a public and an authorized UID and URL when clicking on the puzzle-like icon in the upper right of your tab. Share the public URL with the viewers and the authorized URL with the publishers - that easy. Or alternatively, share the public UID with the publishers along with the passphrase, so they can enter everything manually, which is the less compromising way.

It's all free, no registration required, all without limitations, and can be embedded like a youtube video or the like (right-click and select "Copy embed html").

Feel free to contact me, looking forward to your feedback.

PS: One thing to note is to select "Multicast" when choosing your camera. This way an unlimited number of viewers may watch the streams, in a self-organized peer-to-peer way.