how to find the true playlist of video stream

[anctop]

Hi,

I understand that this is an old topic, but I can't find a complete answer for my case.

For example, in order to download the stream from http://mytv.tvb.com/tc/cat_lifestyle/wildalaska/236815, I'm told to follow the steps :

1. examine the "json" at
   

   http://api.mytv.tvb.com/rest_user_subscription_api/video_path/format/json?id=236815

   extract the path of the desired quality
   

   rtmpe://wowza.stream.tvb.com/vipo/_definst_/mp4:vipo/34/6751/675050/000000873828.mp4?ts=1456189210&sig=0cb7dc9bcfc29c8b1008b91c0937468d&audioindex=0

2. create the hls url with the "ts" & "sig" values in the path
   

   http://streaming.tvb.com/vipo/_definst_/vipo/34/6751/675050/000000873828.mp4/playlist.m3u8?ts=1456189210&sig=0cb7dc9bcfc29c8b1008b91c0937468d

   and then retrieve with livestreamer or ffmpeg.

My question is : Starting from the original url, how can I find the two "magic" url's ?

http://api.mytv.tvb.com/rest_user_subscription_api/video_path/format/json?id=236815

http://streaming.tvb.com/vipo/_definst_/vipo/34/6751/675050/000000873828.mp4/playlist.m3u8?ts=1456189210&sig=0cb7dc9bcfc29c8b1008b91c0937468d

What tools are required for their determination ?