background:url('https://i.imgur.com/Eujmy39.jpg')center/cover no-repeat}#xatstyheader{background:none;}hr{visibility:hidden;}td{background:none;}a{text-decoration:none;}td p{color:#fff;}td p a{text-decoration:none;color:red;}#xatstyabout{background:rgb(255, 255, 255, 0.5803921568627)}*{transition:0.4s ease 0.3s}#xatstyabout0{opacity:0}#xatstyabout0:hover{opacity:1}a:hover{filter:blur(1px)}


en el restangulo grande que te dire va esto

[youtube:560:315:ebb5AinKxWI:&autoplay=1&showinfo=0&modestbranding=1&disablekb=1&autohide=0&controls=0&disablekb=1]


nota: url('https://i.imgur.com/Eujmy39.jpg') dentro de 'ahi va la imagen que quieres colocar de fondo '  alguna duda decimela