Hello,
First, thanks a lot for your project 
We are hosting our own self-hosted jitsi instance, made some tweaks to the frond-end (see bellow: we just fork jitsi-meet repo to do so)
It’s working great, but we plan to have a peaks of usage in 1/2weeks, between 5k/10k users simultaneously.
So I was wondering, would it be ok to use the official meet.jit.si video bridge to handle this peak? (it will happen during the night European time).
If so, how can I do that ? Should I use the iframe api to point to your domain instead of mine, in this case, I will lose my frontend customisation ??
Should I edit my /etc/jitsi/videobridge/sip-communicator.properties to do so ? I am a bit lost here.
Thanks,
Arnaud