Tidier YouTube (BETA layout). Hides promotional videos sidebar and other unnecessary junk and makes homepage like classic Google with no content, except site information and search bar.

NOTE: For those who want to keep the subscriptions panel, overwrite the first few lines with this (what is between and, not including them):

.wsHeading, .v75WrapperOuter, .v75WideEntry, #commentsDiv, #footTopDiv, #sharingImg, #iconMail, .currentFlag, #leaderboardAd, #hpSideContent, .search,
#hpFeaturedHeading, #hpFeaturedAndSmallTabs, #active_sharing, #hpFeatured, #hpFeaturedMoreBottom
{
display: none !important;
}