I have an issue concerning full screen videos within the Google Chrome browser. The video lags for a second.
Since it is too hard to explain, I captured 16 seconds of video.
What could be the cause on this?
If I've understood the video correctly, it's the long animation you're wondering what is? I don't see any other lag, please do correct me if I'm wrong.
Using the HTML5-version of YouTube, utilizes OS X's built in full screen mode. The animation from single-window to full screen in OS X is this slow, and it annoys me as well. Try disabling the HTML5-mode from here, or to shorten and/or remove the full screen animation it alltogether, see this question and it's answers.