@freebliss I use theater mode on youtube, so I can describe what I expect if that helps.
Viewing area should be as wide as the browser window, with a black background.
Video should be centered and as wide as possible without cropping. Put another way, it should fill the height of the viewing area and retain its aspect ratio.
If I size the window down vertically, it’s OK for black bars to fill the sides of the viewing area. That’s better than clutter.
I’ll share why in a second. 1/2



