Hi,
you can search the memory (simplest method) for securetoken string and you find it 2 times.
This token you need to play the rtmp stream you got but there is also a playlist you can play without this token just with app token.
Code:
livestreamer "hlsvariant://http://edge.ultracast.me:1935/live/sky12rFLu/playlist.m3u8?Token=..........." best
Just put your app token at .... and then play it with Livestreamer.
greetz