A few videos of echinoderm species;
Cute Crinoids – A small clip from the Monterey bay aquarium showing sea lilies and feather stars
Happy Holothuroidea – Video clip from a ROV (NOAA Ship Okeanos Explorer offshore Kona, Hawaii (March 2010)). The video footage shows a pelagic sea cucumber (apodid holothurian) between 0.28 -0.47 seconds.
Outgoing Ophiuroidea – Video clip displaying a brittle star food fight at 2400m below sea level.