Daily is an amazing batteries-included video calling provider.
We're using them at Introwise to power our in-browser video calls with live streaming and recording, and only hear positive things from our end users about the call reliability and quality.
Their SDK is the simplest that I've seen from the integration viewpoint. It hides the complexity, but also allows to go low-level for implementing really customized user experience.
The support and community are top-notch.