The whale in the video is the son of Tilikum, the orca who killed senior trainer Dawn Brancheau in 2010. After her death, the Occupational Safety and Health Administration (OSHA) ordered the company not to allow its trainers in the orca tanks. The company appealed this decision, but finally accepted the ruling last April.
However, OSHA's mandate didn't cover "medical pools," the small isolation tanks that whales can be moved to for procedures. Dr. Naomi Rose, a marine mammal expert, told The Dodo last October that trainers routinely enter these pools, in fact, arguing that interaction with the whales "desensitizes" them to contact with humans, making them less likely to attack should a person fall into a pool.