Is https://meet.jit.si/ safe to use for video conferencing?

I tried to install jitsi on our own server, it was successful but it only works for a few users. I am confused about how to determine how many server resources are needed, what server settings are the best. I plan to use it for about 1000 users, with 30-50 users per room. can https://meet.jit.si/ handle it? if not, how many server resources do I need?

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