@-moz-document domain("youtube.com") {
#page.watch-medium #watch7-video, #page .watch-medium #watch7-video, #page .watch-medium #player {
width: 950px !important;
}
#page.watch-medium #watch7-player, #page .watch-medium #watch7-player, #page .watch-medium #player-api {
width: 950px !important;
height: 560px !important;
margin: 0 auto !important;
}

.watch-medium #watch7-playlist-tray-container {
height: 724px !important;
}
.watch-playlist-collapsed #watch7-playlist-tray-container {
height: 0 !important;
}

.watch-medium .watch7-playlist-bar, .watch-medium #watch7-main {
width: 950px !important;
}

.watch-medium #watch7-sidebar {
width: 610px;
max-width: 610px;
}

.watch-medium .watch-sidebar-body li {
display: inline-block;
width: 300px;
}

.watch-medium #watch-more-related-button {
margin-left: 305px;
}

/* Styles for youtube before the october layout change, a.k.a. pre-watch7: */
#watch-video.large #watch-player, #watch-video.medium #watch-player{
height: 750px !important;
margin: 0 auto !important;
}
#watch-video.medium, #watch-video.large, #watch-video.large #watch-player, #watch-video.medium #watch-player {
width: 950px !important;
}

}