Hi I originally wrote WARP and used something similar at Twitch. It supports CMAF segments, so the media encoding is backwards compatible with HLS/DASH and can share a cache, which is a big deal for a gradual production rollout.
Yeah, and CMAF is just a fancy word for fMP4. The f in fMP4 meaning an MP4 file that has been split into fragments, usually at keyframe boundaries, but fragments can be as small as 1 frame if you're willing to put up with the overhead.
The Big Buck Bunny example on the website is actually streamed using CMAF -> MoQ code I wrote.