Getting video link from URL to feed livestreamer

Hi!

There's certain streaming I'd like to save but it won't be available till the moment it starts. I have the link though (it says unavailable if you open it now), and it's in this format: http://vmf.edge-apps.net/embed/live.php?streamname=<name of the stream>&autoplay=true

I've installed livestreamer and wanted to try recording something else from "vmf.edge-apps.net" to try it out, since there's no time for trying things when the stream I want starts.

So, there's this TV channel, http://www.tvpublica.com.ar/vivo/, that if you look in the page's source you can find a link in the same format as above. Here's the link: http://vmf.edge-apps.net/embed/live.php?streamname=c7live01-20034&autoplay=true

I looked around and found this thread: https://forum.videohelp.com/threads/379186-Tricky-stream-to-download-%28

A kind user there shows the OP the command line for livestreamer, but I'm curious to know how did he extract the "hlsvariant://" link, given that the OP only posted a link from vmf.edge-apps.net


Thanks for any help