You don't need software for this. There are multiple solutions out there running directly in the browser. I've been most satisfied with https://proficonf.com, but do try more of these services and choose whatever suits your personal preferences.
Not really comfortable with it, but okay.
I've found it on ProductHunt when they launched and they had a very positive reaction. It's cheap, so I've decided to give it a try.
App name is Proficonf. https://proficonf.com/
It has some issues, but overall I am very satisfied with it.
Name: Proficonf
Location: Odessa, Ukraine
Pitch: Web-based video conferencing app, up to 500 participants, screen, apps, tabs and document sharing. No downloads or installations. Works in mobile web-browser as well.
Details: Built on WebRTC, Jitsi and Node.js.
Looking for feedback: Would be glad to hear your feedback on every aspect (landing page, conference etc.)
Download: Nope. Just open the link, sign up using Facebook or Google and create an event.
URL: Proficonf
Purpose of Startup: Web-based video conferencing app
Technologies Used: WebRTC, Jitsi, Node.js
Feedback or Support Requested: Would be glad to hear your feedback on every aspect (landing page, conference etc.)
Comments: Just open the link, sign up using any social network or Google and start a conference.
P.S. Impatient to get your feedback.
Name: Proficonf URL: https://proficonf.com/ Purpose of Startup: Web-based platform for video conferencing, allows you to share screen (not only just whole screen, even only tabs and applications), handle up to 500 people in the same ''room", doesn't require any installations or downloads Technologies Used: webRTC, JavaScript, RoR Feedback or Support Requested: on everything, quality of video and sound, UX/UI etc. Comments: If you can support me on Product Hunt's Upcoming https://www.producthunt.com/upcoming/proficonf-3