https://www.youtube.com/watch?v=8x1mO1d6-4w
https://www.w3schools.com/html/html5_video.asp
https://www.informaticaweb.nl/lesmateriaal/css/div_element.html
https://www.w3schools.com/css/css_overflow.asp
https://www.w3schools.com/css/css_float.asp
https://stackoverflow.com/questions/1181689/can-i-set-font-size-relative-to-page-size
https://stackoverflow.com/questions/16676166/apply-border-radius-to-scrollbars-with-css
https://stackoverflow.com/questions/14817848/div-with-rounded-corners-and-internal-scrollbars/14818518
https://stackoverflow.com/questions/18531895/how-to-make-two-divs-float-side-by-side
https://stackoverflow.com/questions/35283476/how-to-make-html-page-appear-the-same-for-all-displays
https://stackoverflow.com/questions/17751093/how-to-make-a-transparent-border-using-css
https://stackoverflow.com/questions/9371669/how-to-place-a-text-next-to-the-picture/9371756
https://stackoverflow.com/questions/9067892/how-to-align-two-elements-on-the-same-line-without-changing-html
https://stackoverflow.com/questions/1575141/how-to-make-a-div-100-height-of-the-browser-window