будет работа вебмастерам и вебпрограммерам, если я правильно прочитал анонс.

YouTube announced that it has officially transitioned to the newly-published HTML5 standard as its default video player, and away from the older proprietary Adobe Flash standard.
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YouTube announced that following the transition, it will begin to shut down and remove Flash object tags that previously allowed users to embed videos. As a result, in the near future Flash-based embedded videos will cease to function. For websites and blogs that contain a large number of embedded videos, this will be problematic and time-consuming to fix.

YouTube will now use the iframe API for users to embed videos, a standard neutral embedded format that will work on both Flash and HTML5. All current videos that users wish to keep on their individual web pages should be changed over to the iframe API in order to avoid sudden removal of videos.

http://www.tomshardware.com/news/youtube-transitioning-html5,28472.html