https://en.wikipedia.org/wiki/16:9_aspect_ratio ,
https://www.rtings.com/tv/learn/what-is-the-aspect-ratio-4-3-16-9-21-9 ,
https://en.wikipedia.org/wiki/Widescreen ,
http://www.diamondcase.com/Knowledge/Knowledge_HTML/Aspect_Ratios.HTML ,
https://www.crutchfield.ca/S-Fn1iN11jYur/learn/HDTV-aspect-ratio.html#:~:text=Aspect%20ratio%20basics&text=The%20term%20used%20to%20describe,have%20a%2016%3A9%20ratio.&text=While%20virtually%20all%20new%20HD,the%20conventional%204%3A3%20ratio.
