I did some research and apparently life on Earth ends sooner than this video might lead you to believe. According to wikipedia - the luminosity of the sun is increaseing by 10% for every 1 billion years. "The increase in solar temperatures is such that already in about a billion years, the surface of the Earth will become too hot for liquid water to exist, ending all terrestrial life."However terrestrial life may have already ended by that point - for as Earth becomes a global desert, carbon-dioxide levels are expected to drop. "At a certain point - which one study indicates may be in 500 million years - there would not be enough carbon-dioxide left to support photosynthesis, and most plants would die. The remaining plants would not be sufficient to support a biosphere."However - before that happens - we still have global warming to worry about. Some studies indicate that it could drastically destabilize the global climate in as little as 100 years. And - if so - that would only be the beginning.For our sake I hope we find some way to survive these coming crises.

Some day the world is going to end, maybe even later today no one knows. There is no need to worry though as this sword of Damocles has hung over the heads of our ancestors since before they knew such a thing was even possible.
If you're the worrying type just remember that there is absolutely nothing you can do about it.
Let's say we see an earth ending asteroid heading right towards us 2 years ahead of time. We would still all be killed when it hit, in real life Bruce Willis don't know nothin' bout destroyin no asteroids, that reality unfortunately isn't like that terrible, terrible movie.
When doomsday's date has been figured out just breath. Go ask that attractive guy/girl out, the worst they can say is no and then pull your pants down in front of everyone. The sound of their laughter will be burned into your brain for the rest of you life, but hey if the rest of your life is only a few hours or days.

Its a lot like ... driving on the interstate. I'll take my chances with the gamma rays. Its OK to speculate these things but this presentation is a little over the top.