Could sslv3 be disabled on meet.jit.si?
I think this site is under the control of Jitsi people and not the
university so hopefully it's an easy fix.
Pretty soon Google's Chrome won't support sslv3 so there's not really
a reason to keep it enabled.
See https://cipherli.st/ on how to disable sslv3 in Nginx but
basically you're removing sslv3 so the protocols will look like:
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;