Audio settings. Intro video volume level

What this problem is related to? (e.g. Game / Launcher / Website / etc. ): Game

Describe the problem:
Audio settings do not affect the volume of the intro video.

What was the expected behavior?: Audio settings should affect Intro video volume level.

List the steps that occurred before the problem appeared:

Can you reproduce the problem?:

Operating System, Browser version, Antivirus, or any other related platform information (if relevant):

Screenshots/Videos (if available):