lists
https://www.youtube.com/playlist?list=PLeDR6lYFEHWFzPdty8P7Kj49ckcEtP5nk
    need to look

LibreTrack - Free Communication Services ru
    https://www.youtube.com/playlist?list=PLeXIZ4CMifP0wVlQnabAeaGmHRtbaRwfx
    ! need to look

2025
LinuxShelf - Which Messanger to Choose in 25 0:00 of 14:32
    https://www.youtube.com/watch?v=rQQeGzY_8gs
2021
LibreTrack - Doubtful Free Messangers ru of 9:13
    https://www.youtube.com/watch?v=UZjcR7ssFu4
RobBraxmanTech - Best Secure Instant Messaging Apps for 2021 7:00 of 28:54
    https://www.youtube.com/watch?v=ke8pXQQPaIw
    https://bytzvpn.com/ovpn/
    ! signal (message transfer is secure)
2020
FreePrograms - WhatsApp Telegram Viber and Skype Alternative - Element of Matrix of 19:48
    https://www.youtube.com/watch?v=nj67fHi-zSM