.u-section-1 {background-image: none; min-height: 100vh}
.u-section-1 .u-video-1 {width: calc(((100% - 1140px) / 2) + 1275px); height: 858px; margin: 103px auto 0 0} 

@media (max-width: 1199px){ .u-section-1 .u-video-1 {width: 940px; left: -150px; margin-left: calc(((100% - 1140px) / 2) + -50px)} }

@media (max-width: 991px){ .u-section-1 .u-video-1 {width: 720px; margin-left: calc(((100% - 720px) / 2))} }

@media (max-width: 767px){ .u-section-1 {min-height: 549px}
.u-section-1 .u-video-1 {width: 540px; margin-top: 60px; margin-left: calc(((100% - 540px) / 2))} }

@media (max-width: 575px){ .u-section-1 {min-height: 473px}
.u-section-1 .u-video-1 {width: 340px; margin-left: calc(((100% - 340px) / 2))} }