I watched a full length video of it and i'm wondering why the divers sound like they're on helium when they speak!?
Because at that depth they are breathing a mixture of oxygen and helium I believe, look it up.
I liked the part in the video where the South African guy on the support vessel is talking to the survivor:
"Whut waas yur rink?" (What's your rank?)
very squeeky "Chef sir"
"The cuk? dey always survive"
Made me chuckle and made me sad: this guy is having a joke to cheer up the survivor but also...his job is to pull dead bodies from ships, what a job...