YouTube later today is expected to go live with a major overhaul of its video pages. Exactly what elements of the overhaul are reflected in the switch won’t be fully known until it goes live, but the company says its one of the biggest of its history. Details of what’s to come are listed in the company’s blog. Highlights include a new playlist interface that, among other things, lets users control the AutoPlay feature, the ability to add videos to playlists from search results, integrated comments, and more.

Twitter also made tweaks to its homepage, adding a constantly updated list of top Tweets and a random list of suggested Twitters to follow. Trending topics now scroll atop the page as well.