For all who have been awaiting the release of a video of China's Chengdu J-20 stealth fighter jet, which made its first flight on January 11 of this year, Youku has you covered. In a recently released clip, we can see the J-20 performing high speed taxiing tests at Huang Tian Ba airport, Chengdu. A quick summary of the characteristics of the J-20 can be found here. Of note is the rather loud exhaust noise coming from the "stealth" fighter. One would expect this to be modestly muffled in the final version. Regardless, at least China can now boast via "leaked" videos that it has both a stealth fighter and an aircraft carrier, ignore that both are probably nothing more than the epitome of reverse engineering.
And a video of the actual first test flight from early January can be seen below: