Youtube video issues using Windows10 Desktop, Brave and DuckDuckGo


Description of the issue:
How can this issue be reproduced?

1.Youtube videos do NOT start using Windows 10, Brave and Duckduckgo
I would expect the video to play once I have selected it (as it does when I use Windows 10, Google Chrome and DuckDuckGo), but I now have to click the red “Play” button.
This happens with every ***** video.

2.Youtube videos PAUSE when I adjust the SOUND VOLUME
I would expect the video to keep playing and the required sound adjustment to take immediate effect (as it does when I use Windows 10, Google Chrome and DuckDuckGo), but I now have to click the red “Play” button to get the video to restart.
This happens with every ***** video.
3.

Expected result:

Brave Version( check About Brave):
Version 1.18.77 Chromium: 87.0.4280.101 (Official Build) (64-bit)

Additional Information: