Why do the video players make no sound?
In VLC, in Audio settings, I chose Reverse Stereo, and suddenly I got sound back!
Following that: Left, Right, and even regular Stereo now work.
On VLC >
Right Click > Audio > Audio Devices >
I had 2 devices
HDMI Audio and
Built in Analog Audio. Selected one was the HDMI Audio. I changed it to Analog Audio and both the players were fixed after that change.
Audio might be muted. In VLC, right-click on the VLC screen, in the context menu select Audio and see if Mute is checked.