Translation and my thoughts...
"lo siento, pero en cuanto me di cuenta de que era un video de linkin pork, se fue todo al traste... esos tios no son mas que unos niñatos que hacen musica de niñatos para niñatos que compran sus asquerosos discos hechos para ser el opio de las masas... todo prefabricado..."
"I'm sorry, but when I remember that this is a Linkin Park video, I become ????...these guys are nothing more than little kids who make music for little kids who buy their terrible CDs made to be the marajuana of the masses...completely prefabricated."
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Anyway, now for my opinion:
Excellent. I truly hope that this isn't factually based, but if it is, you have my condolences. I, myself, am a LP fan, and the flash could easily be a music video for the song. I couldn't figure out what "se fue todo al traste" means...closest I could get is "I become completely depressed," (traste is close to triste, which means sad...I sense misspelling) but I don't think it makes sense. I think you get the idea of his/her review though.