Apparently, Hydra just couldn't wait until next weeks "Agents of SHIELD" episode to air the trailer for the second Avengers movie dubbed Age of Ultron. The trailer was released nearly a full week before it's scheduled air date.
The fact that Marvel is blaming Hydra is really cool. Instead of complaining about the leak, Marvel fired back by releasing the trailer on YouTube. Apparently, the company decided that running around taking the video off the viral approach wasn't nearly as cost efficient as putting out there for real.
Well played Marvel, well played, oh and congrats on what looks like another winner:
The word epic does not do it justice. Give it some time to load, because YouTube is getting overwhelmed quickly.