In case you're confused, eterm was just proposing this as an option. At this time the Twitch app does support casting from the desktop, Android, and iOS [0]. This roundabout solution would only be needed if Amazon decided to remove that functionality.

[0] - https://help.twitch.tv/customer/portal/articles/1691460-chro...

You don't have to dig around for the underlying video stream, you can actually just paste a twitch stream link straight into the vlc network stream dialog, I'm not sure what magic it does but that's worked even well before this new version.

yes

And, in fact, discontinued.