The video contains your usual vague proclamations of doom and ego-boosting statements, although with Anonymous' past activity, it will be hard to ignore the threat. The collective of hackers were thought to be at least partially responsible for the attack on Sony earlier this year that forced the company to take its network and games offline.
SOPA is a proposed U.S. bill that would allow law enforcement to combat pirated digital goods by shutting down websites and blocking payments to site owners. While the bill is supported by Hollywood, the music industry, and some major game companies, SOPA opposers worry that the bill will infringe on First Amendment rights and permanently harm the internet.
You can watch the Anonymous declaration after the jump.