I’m rather curious where we promised HTML5 support a year ago. Do you have a link?
Currently there’s a vast difference in browser support for archival video playback vs real-time video playback. Many browsers support H264 playback, but they assume that all of the video is available at the start of playback. There’s little native support for HLS and, until recently, there was no good way to shim HLS support.
We’re very interested in supporting HTML5 video playback in all browsers and are actively working on it, but there’s no ETA.