If you are confused,
Original opening:
https://www.youtube.com/watch?v=HKNDZLZbEZE

Vectors:
http://mlp-vectorclub.deviantart.com/

Green Screen ponies:
http://www.youtube.com/user/GreenscreenPonies
http://www.youtube.com/user/LittleshyFiM

Clips used:
https://www.youtube.com/watch?v=6t7GbgsJsDo
https://www.youtube.com/watch?v=i9k2OCJk81M