Win, nix, android video in the inside network — is it possible?

Good day.
There is a local network isolated from the Internet. some clients under the Window, some on ubuntu and Android. We need to organize a text, audio and video calls between these devices. If the conferencing system is generally good. Read about all sorts of Asterisk, jabber, etc but did not understand good works, video conferencing in jabber, is there any difference in what customers use and whether there are clients for android. and does asterisk with PC/Android devices without special IP phones. The server part preferably on Linux. Put on the right path in what direction I dig.
July 2nd 19 at 13:54
3 answers
July 2nd 19 at 13:56
Solution
You need a server to communicate including video.
It can be:
1. Asterisk
2. FreeSwitch
3. More, but already paid FOR
If someone knows another name free - add in comments

You need to check that this works better with video. Well, then implement.
Originally 1 and 2 p. sharpened by telephony. Video calls support, but ACC. there may be nuances.

PS:
Add about customers. Jabber itself then you do not need, you can use a Softphone like X-Lite ( or the paid version of Bria) well many others ( Google is easy) with video support.
Also eat md selling the hardware phones that support video calling. Good phones from Yealink for example.

If you need a purely video conferencing, the software is for telephony-enabled video calls not quite right for you. Well, you can adapt, but it will look like a spike.
So I chose the Asterisk, I understand that populiarnoe today, and are there any Android apps to work with it. Sorry for the stupid question - meaghan_Grady30 commented on July 2nd 19 at 13:59
: looking for a Softphone for Android with support for video calls - Terrell.Stehr18 commented on July 2nd 19 at 14:02
July 2nd 19 at 13:58
July 2nd 19 at 14:00
And who will tell you similar solution: _broadcast_ video stream (stream screen) for lectures on diverse hardware (especially cheap Chinese tablets) through Wi-Fi ?

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