Stubby Squid (Rossia pacifica)
Video by Jackie Sones

Opalescent Squid Egg Laying - Damian Davalos

Baby Caribbean Reef Squids -  Barry Brown
Previously

Dance of the Chromatophores - RWNPhoto
Macro footage of squid chromatophores flashing various colours.

Little Squid
Underwater video by film-makers Libor Spacek and Petra Dolezalova
From the documentary series Escape to Nature
Music by Ole Jørn Myklebust

The deep-sea squid Taonius sp. has large eyes bulging from its head and photophores, or light organs, under the eyes. They are found in the deep midwater below 300 meters, often hanging motionless with their arms above their body.

The firefly squid of Toyama Bay, Japan

Neurally activated iridescence in squid iridophores - RoyalSociety