Is cloudflare R2 egress actually unlimited?

I am working on a video sharing site and I’ll be storing all types of video in various resolutions.
The end user will be able to stream it as the browser allows it to.
There is a possibility that the site might blow up and attract millions of viewers.

Before I go in and invest deep in cloudflare R2 infrastructre, I want someone from cloudflare to assure me that the R2 egress is actually unlimited/infinite regardless of how it is used.

It says egress is free but storage and api requests are billed.