Video and Audio Streaming ONLY! Option (NOT) Remote Play! In New Game Streaming App (beta)!

SOLVED: I had to turn on Media streaming in "Media streaming options", a buried control panel screen that the only way I know how to find is by going to the start screen (win 8) or start menu (win 7) and typing "media sh". I also installed the Xbox Video
app on the Xbox. Without it installed, video files were playing audio-only in the Xbox Music app.

I mean for using it just to stream the video/audio to computer while still playing on the Xbox in order to screen capture to streamlabs in order to have more creativity with twitch.

Now my only option I know of is to buy a capture card.

Improve streaming on Xbox Improve Xbox app for Windows 10 game streaming performance

By making a few adjustments to your home network, you can improve your audio and video quality when streaming games. Try the suggestions on this page to improve your game streaming performance when using the Xbox app on Windows 10.

As others have stated, there is no way to record your audio while using the 'record from now' function.

I stream to mixer and that captures my mics audio, and it's really easy to do too.

The only other alternatives to a capture card is to stream directly from your console to Mixer or Twitch, or use the Xbox App on Windows 10 to stream your console's audio and video to the windows 10 device, then you can use some other software to record,
or stream. ( I hope that made sense).

the new xbox (Beta) app does not have the streaming feature. You need to keep using the companion app until the streaming feature is added to the new app.