"...'Ogg' is a wrapper that ties together 'Theora' encoded video and 'Vorbis' encoded sound. Together, Ogg Theora+Vorbis give users a way to see movies on your computer. Ogg Vorbis+Theora are not known to be encumbered by any patents (the only applicable patent on Theora’s predecessor, called 'VP3', was licensed for everyone to use in any way they want).

"...Ogg is professional-grade media format. Ogg Vorbis encodes audio and Ogg Theora encodes video. [...] The companies that control the software design it to restrict the users and spy on them. If you choose Ogg Vorbis and Ogg Theora, you can listen to audio and stream video using many different media players, including free software that respects your freedom..."

"...As some of you Neuros old timers may recall, we were the first to port the Ogg Vorbis audio codec to a portable HDD audio player. Now it's time, hopefully, to do the same with the Ogg Theora video codec..."

the and tags along with native support for Theora video and Vorbis audio are currently enabled in the Firefox nightly builds. This will ship in Firefox 3.1 Beta 1 coming later this year. This is not new news but I did want to provide my perspective on why this is important[...] Download a Firefox nightly build here and test it out here or on Wikimedia Commons.

HTML5 spec is expected to introduce new audio and video capabilities into the HTML language. However, it seems that Nokia and Apple have succeeded in removing Ogg Vorbis and Theora support from the current draft which decision has caused lots of heated political discussion. Some critics claim that the decision is mostly based on reluctance to back a standard that has no provision for including DRM, while others have mentioned potential patent uncertainties as the main reason not to back Ogg Vorbis and Theora.

Cortado is a Java applet that provides support for OGG Theora/Vorbis to Web publishers. It’s particularly useful to publishers that want to use OGG Theora/Vorbis in Browsers that do not yet support the HTML5 video element with Ogg.

From today, users will be able to download and install free software to play and encode the new WebM format. WebM is based on the Matroska container format -- replacing Ogg -- and the VP8 video codec which replaces Theora. Crucially, the Vorbis audio codec is part of the new WebM specification.

"...User agents should support Ogg Theora video and Ogg Vorbis audio, as well as the Ogg container format..."

"It was announced at the Firefox Plus summit today that Firefox will include native Theora and Vorbis support for the HTML 5 media elements. So and will support those codecs built into Firefox itself..."