These four features are all implemented, and can already be used on instances updated to version <em>v1.0.0-beta.10</em> (for example <a target="_blank" rel="noopener noreferrer" href="https://framatube.org">https://framatube.org</a>). Regarding the subtitles support, you can test them on the <a target="_blank" rel="noopener noreferrer" href="https://framatube.org/videos/watch/217eefeb-883d-45be-b7fc-a788ad8507d3"> the "What is PeerTube"</a> video.