Domain access through a custom domain allows you to use Cloudflare Cache to accelerate access to your R2 bucket.
By default, only certain file types are cached. To cache all files in your bucket, you must set a Cache Everything page rule. For more information on default Cache behavior and how to customize it, refer to Default Cache Behavior
Finally, we made it clear that customers can serve video and other large files using the CDN so long as that content is hosted by a Cloudflare service like Stream, Images, or R2. This will allow customers to confidently innovate on our Developer Platform while leveraging the speed, security, and reliability of our CDN. Video and large files hosted outside of Cloudflare will still be restricted on our CDN