Install it on Android, or open it in a browser right now — the same meetings, the same account.
Android may warn you. This app is not on Google Play, so the phone
asks once whether to allow the install. Everything after that is ordinary.
Which file? Nearly every phone made since 2016 takes the first one.
If it refuses to install, take the second.
On Linux, the packages need mpv for audio and video —
most distributions already have it, and the package will ask for it if not.
On Windows, run the installer — it adds a shortcut to the Start
Menu and the desktop. If your machine won't let you run installers, take
the zip instead: unzip it and run the exe inside, nothing else is written
to the machine. Either way, the first time you run it Windows will say
"unknown publisher"; click "More info," then "Run anyway." That warning is
shown for any app without a purchased code-signing certificate and has
nothing to do with whether the file is safe.