When it is planned to issue a stable version?
Nightly versions have many pleasant improvements, but they are declared as unstable. Whether there is a recommended (reliable) nightly version which can be used in practice?
You can safely use the current nightly. If you ever have a problem with a video, you could then check for newer nightly version and see if that issue is gone. It is now nearly 2 years I'm running on nightly only, never had any serious issues doing so.