[pkulak]

It sounds to me like they want the YouTube Music app to open when you search for a song on the YouTube app. Those are two entirely different apps, with different content, experiences, etc. It just so happens that Google named them the same, probably so they could more easily force integrations like this.

[judge2020]

As said in the sibling comment, Google has combined all of their TV apps besides YTTV into the YouTube app. Music/Movies/Regular videos are all via that app. OP is saying "if i'm in an app, I want voice search to focus that app's search bar".

[p_j_w]

At least on my Nvidia shield, this is not the case. YouTube Music is part of the YouTube app.