Hi  @OllieNet 

Isn't it on mute by default by the preview small window?

The small-screen preview does not have the sound. Muted.

If you click it to view full-screen, it is unmuted and it is using the media volumn. The media volume instead of the mute. It is a sound mechanism with your Android. This is the same to the iOS if your media volume has a value, when plays a video/music, it still plays even if you have set it as silence mode.