The new look for Google’s popular video site is part of the preparation for the upcoming introduction of services featuring professionally produced content from providers such as Disney, Lionsgate, Madonna, Jay-Z, Slate, The Wall Street Journal, Thomson Reuters — and our parent company, which will have a channel called PMC Entertainment. YouTube says that its revamped home page will make it “easier to find and follow great channels when you arrive.” There’ll be three columns: one on the left has the visitor’s favorite channels, the one in the center has the channels’ latest videos, and on the right YouTube will offer options that it figures the visitor might like. For the system to work, YouTube is encouraging people to sign in. There’ll also be integration with Google services including Google+ and Gmail, as well as Facebook. The goal is to encourage people to spend more time with the site, and make it more appealing to advertisers. Here’s YouTube’s video describing the redesign: