OK, I appreciate your very quick reply, but if someone in the Dev Team can actually answer this question, when they get a free moment to do so I'd be very grateful.

I, as a MOS user, mistakenly take it for granted that MPlayer is basically part of MorphOS, as is Frying Pan, though I know Frying Pan was never authored by anyone on the Dev Team, but MPlayer has been worked on by others who are, AFAIK, but they are an often associated with being an intrinsic part of the useablility of MorphOS as a whole, but I will bear in mind they aren't part of MOS as such in the future.