Boh's full video:
https://www.youtube.com/watch?v=VDR4R965-WQ

Eizen's full video:
http://www.dailymotion.com/video/x1i8j5g_let-s-react-to-mlp-fim-s4-e15-twilight-time_fun

Background from:
MLP: FiM season 2, episode 20 - It's About Time