According to WordPress Team this has better embed and other cool features. I am just going to copy paste everything from there page and see what happens.
Version 4.0 of WordPress, named “Benny” in honor of jazz clarinetist and bandleader Benny Goodman, is available for download or update in your WordPress dashboard. While 4.0 is just another number for us after 3.9 and before 4.1, we feel we’ve put a little extra polish into it. This release brings you a smoother writing and management experience we think you’ll enjoy.
Manage your media with style
Explore your uploads in a beautiful, endless grid. A new details preview makes viewing and editing any amount of media in sequence a snap.
Working with embeds has never been easier
Paste in a YouTube URL on a new line, and watch it magically become an embedded video. Now try it with a tweet. Oh yeah — embedding has become a visual experience. The editor shows a true preview of your embedded content, saving you time and giving you confidence.
Focus on your content
Writing and editing is smoother and more immersive with an editor that expands to fit your content as you write, and keeps the formatting tools available at all times.
Finding the right plugin
There are more than 30,000 free and open source plugins in the WordPress plugin directory. WordPress 4.0 makes it easier to find the right one for your needs, with new metrics, improved search, and a more visual browsing experience.
This release was led by Helen Hou-Sandí, with the help of these fine individuals. There are 275 contributors with props in this release, a new high. Pull up some Benny Goodman on your music service of choice, as a bandleader or in one of his turns as a classical clarinetist, and check out some of their profiles:
_Redd, Aaron D. Campbell, Aaron Jorbin, Adam Silverstein, Alex Mills (Viper007Bond), Alex Shiels, Alexander Rohmann, Alison Barrett, Allan Collins, Amit Gupta, Amy Hendrix (sabreuse), Andrea Fercia, Andres Villarreal, Andrew Mowe, Andrew Nacin, Andrew Ozz, Andy Skelton, Ankit K Gupta, Anton Timmermans, arnee, Aubrey Portwood, Austin Matzko, Ben Dunkle, Bernhard Kau, Boone Gorges, Brady Vercher, bramd, Brandon Kraft, Brian Krogsgard, Brian Layman, Brian Richards, Camden Segal, Carbis, Caroline Moore, Charles Fulton, Chouby, ChriCo, Chris Olbekson, chrisl27, Christian Axelsson, Christopher Finke, Christopher Spires, Clifton Griffin, Corey McKrill, Corphi, Daisuke Takahashi, Dan Griffiths, Daniel Bachhuber, Daniel Husken, Daniel Jalkut (Red Sweater), Danny de Haan, Darin Kotter, Daryl Koopersmith, Daryl L. L. Houston (dllh), David A. Kennedy, David Herrera, David Naber, DavidTheMachine, DeBAAT, Dion Hulse, Dominik Schilling, Donncha O Caoimh, Drew Jaynes, Dustyn Doyle, Eddie Moya, Eduardo Reveles, Edwin Siebel, ehg, Enrique Chavez, erayalakese, Eric Andrew Lewis, Eric Binnion, Eric Mann, Evan Anderson, Evan Herman, Fabien Quatravaux, Fahmi Adib, feedmeastraycat, Frank Klein, garhdez, Gary Cao, Gary Jones, Gary Pendergast, garza, gauravmittal1995, Gavrisimo, George Stephanis, Graham Armfield, Grant Mangham, Gregory Cornelius, Gustavo Bordoni, harrym, hebbet, Hinnerk Altenburg, Hugh Lashbrooke, iljoja, imath, Ipstenu (Mika Epstein), issuu, J.D. Grimes, Jack Lenox, Jack Reichert, Jacob Dubail, JanHenkG, Janneke Van Dorpe, Jared Wenerd, Jaza613, Jeff Stieler, Jeremy Felt, Jeremy Pry, Jeroen Schmit, Jerry Bates (jerrysarcastic), Jesin A, Jesper Johansen (jayjdk), Jesper van Engelen, Jesper van Engelen, Jesse Pollak, jgadbois, Joan Artes, Joe Dolson, Joe Hoyle, Joey Kudish, John Blackbourn, John James Jacoby, John Zanussi, Jon Cave, jonnyauk, Joost de Valk, Jordi Cabot, Josh Eaton, JOTAKI Taisuke, Julio Potier, Justin Sainton, Justin Sternberg, Justin Tadlock, K.Adam White, Kailey (trepmal), Kaito, kapeels, Kelly Dwan, Kevin Langley, Kevin Worthington, Kim Parsell, Kirk Wight, kitchin, Knut Sparhell, Konstantin Kovshenin, Konstantin Obenland, Kurt Payne, Lance Willett, Lee Willis, lessbloat, Lew Ayotte, lritter, Luke Gedeon, m_i_n, Manny Fleurmond, Manuel Schmalstieg, Marius Jensen (Clorith), Mark Jaquith, Marko Heijnen, Matt Banks, Matt Martz, Matt Mullenweg, Matt Wiebe, Matthew Boynes, Matthew Denton, Matthew Eppelsheimer, Matthew Haines-Young, mattyrob, meekyhwang, Mel Choyce, mi_cat, Michael Adams (mdawaffe), michalzuber, Mike Auteri, Mike Hansen, Mike Jolley, Mike Little, Mike Manger, Mike Schroder, Mikey Arce, Milan Dinic, mnelson4, Morgan Estes, Mr Papa, mrmist, Mustafa Uysal, MuViMoTV, nabil_kadimi, Namibia, Nashwan Doaqan, nd987, Neil Pie, Niall Kennedy, Nick Halsey, Nikolay Bachiyski, Nils Schonwald, Ninos, Nowell VanHoesen, Patrick Hesselberg, Paul Bearne, Paul Clark, Paul Wilde, paulschreiber, pavelevap, Peter Westwood, Philip Arthur Moore, Philip John, Piet, Piotr Soluch, Pippin Williamson, purzlbaum, Rachel Baker, RC Lations, Richard Tape, Ricky Lee Whittemore, rob1n, Robert Chapin, Robert Dall, RobertHarm, Rohan Rawat, Rouven Hurling, Ruud Laan, Ryan Boren, Ryan McCue, Sam Brodie, Samuel Wood (Otto), sathishn, Scott Reilly, Scott Taylor, ScreenfeedFr, scribu, Sean Hayes, Sean Nessworthy, Sergej Muller, Sergey Biryukov, shanebp, Shaun Andrews, Simon Wheatley, simonp303, Slobodan Manic, solarissmoke, sphoid, Stephane Daury, Stephen Edgar, Steven Jones, strangerstudios, Sumit Singh, sumobi, t4k1s, Takashi Irie, Taylor Dewey, Thomas van der Beek, Till Kruss, Tim ‘Eli’ Dalbey, TobiasBg, Tom J Nowell, Tom Willmot, Topher, torresga, Tracy Levesque, Travis Smith, treyhunner, Umesh Kumar, Vinod Dalvi, vlajos, voldemortensen, Weston Ruter, winterDev, Wojtek Szkutnik, Yoav Farhi, Zack Katz, Zack Tollman, and Zoe Rooney. Also thanks to Michael Pick for producing the release video, and Helen with Adrián Sandí for the music.
Fucking A, it works! Thanks WordPress.