Adobe Flash Player
Steve Jobs also claimed that a large percentage of the video on the Internet is supported on iOS, since many popular video sharing websites such as YouTube have published video content in an HTML5 compatible format, enabling videos to playback in mobile web browsers even without Flash Player.
Internet Browser (Nintendo 3DS)
On the New 3DS, a new video player is integrated into the browser. It can play back both 2D and 3D Videos on webpages which supports HTML5. This eliminates the need for the dedicated YouTube app on the new 3DS.