Which Aps should I use for my 501c3 org for Video-conferencing?

I have attended Web-based Conferences, Web-meetings, etc. LIVE using pre-loaded aps like GOTOMEETING,etc. How can I set-up similar ^ (web-based) meetings wherein the attendees can web-attend in (say) a Public meeting / but Private - for a 501c3 org? Since most of my members already use Facebook, how do I Set the... show more I have attended Web-based Conferences, Web-meetings, etc. LIVE using pre-loaded aps like GOTOMEETING,etc.

How can I set-up similar ^ (web-based) meetings wherein the attendees can web-attend in (say) a Public meeting / but Private - for a 501c3 org?
Since most of my members already use Facebook, how do I Set the certain criteria to allow their entry into the org s Public web-chat while isolating their Private correspondence / feedback - via possibly Live Video?

And / or - how can I allow Public-viewing while Isolating the Private comments in these ^ Web-Meetings via Video-phone Calls?
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