And another question regarding thread.
If I use url like this
then I get current (live) position of the stream with DVR feature and possibility of unwind to the initial time content position. But how can I ban this possibility? I mean how can I cut the length of unwind back say we store content about two weeks but users can unwind only in 2 hours back? This is not situation like with playlists because we need to provide in this case feature of live stream if user will rewind forward.