The only thing you need to do is to specify a Jitsi Server in the module configuration.
If you do not have your own Jitsi server, the official jitsi server "meet.jit.si" is automatically used.
In case you've overwritten the default content security settings, you should make sure following resources are allowed:
script-src
frame-src
Example common.php snippet:
//...
"frame-src" => [
"self" => true,
"allow" => [
"https://www.youtube.com",
"https://meet.jit.si",
]
],
"script-src" => [
"self" => true,
"unsafe-inline" => true,
"allow" => [
'https://meet.jit.si/external_api.js'
],
//...
Note: The default csp should not block any of this.