[*Roma*]

-Cannot play recorded programme while it is still recording

You have to change "Streaming method" to "ffmpeg" in MP Addon settings.

With these settings, DSPlayer will play in-progress recordings but the total time will remain constant - this will be fixed in the next release.

Has this been fixed yet? We like to schedule all of our TV to record in case we aren't in the room precisely when shows start, but quite often we'll start watching the 11 o'clock news, for example, while the recording is still in-progress. It is very frustrating when playback keeps stopping. This is a huge impediment to my family's (wife's) acceptance of the solution. I am using the latest NextPVR (3.5.7) as the backend.

Yes, this is fixed in DSPlayer, playback of in-progress recordings is possible with NextPVR, MediaPortal and ArgusTV.
Links on the first page.