When I was in Thailand, I ate a dish called Dancing Prawn. Living shrimp from the nearby lake where this delicacy is found are dumped on top of a spicy salad that is served in a styrofoam container with a lid. The trick is to open the lid, scoop out a sporkful of salad and shrimp, close the lid and get the spork into your mouth before all the shrimp jump out/off. It was delicious albiet a little odd.
The dish in the video above does not include living squid but instead uses the sodium in the soy sauce to cause the tenticles to react for some reason - and it appears alive. Would you eat this? I certainly would.