This is Tekkit.

Credits: kimitsudesu originally created this for a contest on the SGTekkit forums for that server. So impressed were we with it that we asked if we could use it as the 'official' Tekkit video as a sort of awesome intro. He agreed and we graciously thank him for for it.

His channel is here: http://www.youtube.com/user/kimitsudesu

Music credits

1. C418 - Minecraft Volume Alpha - Haggstorm
2. Richard Strauss - Also sprach Zarathustra - Sonnenaufgang (more commonly known as "Space Odyssey 2001 opening theme")
3. Yasunori Mitsuda - Myth: The Xenogears Orchestral Album - Soaring (more? commonly known as "Flight")