This is a big Architeuthis spp. (Giant Squid). While there have been larger found this is the largest caught on video.
Captured deep beneath the waves: 10-foot squid filmed in natural habitat - World News
Giant Squid Captured on Film - Photo Journal - WSJ
Captured deep beneath the waves: 10-foot squid filmed in natural habitat - World News
Giant Squid Captured on Film - Photo Journal - WSJ