At the same time, the Online Video Player was changed from a 4:3 aspect ratio to widescreen 16:9.
This was followed up in November 2008 by 720p HD support. This offers a significant improvement over standard quality. They can also be viewed with the H.264 codec and stereo AAC audio by adding &fmt=18 to the end of the video URL. High Quality videos, introduced in March 2008, are shown at 480x360 with mono MP3 sound. This was, at the time, the standard for streaming online videos. The original format, now labeled Standard Quality, displays videos at a resolution of 320x240 using the Sorenson Spark codec with mono MP3 audio. The web originally offered videos in only one format, but it now has three main formats, as well as a mobile format for viewing on mobile phones.
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