TL;DR: Camera on. Microphone on. Go.
For my entire industrial career my work relied on effective video calls. I started working as a remote employee for three years, then as a “local” employee, but communicating a lot with remote customers on a day-to-day basis. Today, too, a lot of my time is spent communicating with a remote HQ.
Effective video conference calls are not rocket science, but they may require some setup.