One address for everything. Put the category in the subject line and it reaches the right person faster.
Anything about using the service that the help page does not answer.
Camera, microphone, connection or billing problems. Tell us your browser and device — it halves the back and forth.
Something that happened in a call and worried you. Report in the call as well if you can; it carries the account reference.
Harassment, impersonation, anything involving a minor, or non-consensual recording. These are handled first.
Partnerships, press and everything commercial.
Before you write: the help page answers the common camera and matching problems, and the safety page covers what to do right after a bad call.