WebM is an audio-video format designed to provide royalty-free, open video compression for use with HTML5 video. The project's development is sponsored by Google Inc.

A WebM file consists of VP8 video and Vorbis audio streams, in a container based on a profile of Matroska. The project releases WebM related software under a BSD license and all users are granted a worldwide, non-exclusive, no-charge, royalty-free patent license. Despite this, some in the industry have called upon Google to provide indemnification against patent suits.

Native WebM support by Mozilla Firefox,Opera, and Google Chrome was announced at the 2010 Google I/O conference. Internet Explorer 9 requires third-party WebM software.Safari for Windows and Mac OS X relies on QuickTime to play web media, which as of 1 April 2011 (2011 -04-01)^[update], does not support WebM unless a third-party plug-in is installed. In January 2011, Google announced that the WebM Project Team will release plugins for Internet Explorer and Safari to allow playback of WebM files through the standard HTML5 <video> tag. As of 1 April 2011 (2011 -04-01)^[update], a public preview version of this plug-in is available for Internet Explorer 9.

Leonardo Wilhelm DiCaprio (/dɨˈkæpri.oʊ/; born November 11, 1974) is an American actor and film producer. He has been nominated for the Golden Globe Award eight times as an actor, and won the Golden Globe Award for Best Actor for his performance in The Aviator (2004). He has also been nominated by the Academy Awards, Screen Actors Guild, Satellite Awards, and the British Academy of Film and Television Arts.

Born and raised in Los Angeles, California, DiCaprio started his career by appearing in television commercials prior to landing recurring roles in TV series such as the soap opera Santa Barbara and the sitcom Growing Pains in the early 1990s. He made his film debut in the comedic sci-fi horror film Critters 3 (1991) and received first notable critical praise for his performance in This Boy's Life (1993). DiCaprio obtained recognition for his subsequent work in supporting roles in What's Eating Gilbert Grape (1993) and Marvin's Room (1996), as well as leading roles in The Basketball Diaries (1995) and Romeo + Juliet (1996), before achieving international fame in James Cameron's Titanic (1997).