Yes. Stop looking at youtube vids. I dunno why people make these idiotic videos, but such as it is, there's around 300 possible world-ending factors at work, every day. I mean think about it: USA and Russia go to war. A few nukes, and the earth is already FUBAR.
Or: The moon, as time passes, moves farther from the Earth's gravitational field. The moon is important to tides, our climates, and so forth (source: A discovery video I saw a while back). Think snowing in Egypt.
Or: No USA and Russia nuke war, just World War III breaking out because people are desperate on account of the economic crysis.
I think there's about enough crud to worry about, and that needs fixing before we bother with whatever kills us in the future. And on the note of religion -- there have been around 5-6-7-8-9-10 priests talking about the end of the world on TV stations here. It's getting tedious.
The Earth might suddenly just explode for unknown reasons tomorrow. You shouldn't fret about random things. As Jack O'Neill put it: "We'll jump off that bridge when we get to it". Besides, worrying isn't gonna move planets.