I've set it to a default channel of 55.
listen(integer channel,string name,key id,string m)
if ( llParcelMediaQuery([PARCEL_MEDIA_COMMAND_TEXTURE]) ==  )
llSay(0, "Lacking permission to set/query parcel media. This object has to be owned by/deeded to the land owner.");
PARCEL_MEDIA_COMMAND_PLAY ] );
Features can be added to this as needed.