Just destroyed everything they built in 1 fell swoop. There’s absolutely no reason to use Jitsi at this point.
They built a great software. The software is still there.
meet.jit.si is just a demo instance for the software, nothing more. You’re supposed to use the software yourself.
The interest might be theirs but the “legitimate” part absolutely has to incorporate a written justification somewhere within the the depths of the mandated records of processing activities that explains why the business/institution couldn’t possibly do what they’re doing without processing that particular piece of user data. “I want that” is not legitimate interest in the sense of Article 6.