Yeah, the Squid you posted is the most detailed and documented live Giant Squid encounter. The Squid I posted it actually known as a Glowing Squid because it glows, it was the only one caught on camera as far as I know. It is, however, very big.
I don't know how big the one you posted is. Here are a few images the could give you a clearer picture:
A human hand next to a Giant Squid's tentacle

An adult Giant Squid

A dead Giant Squid, which washed up to shore in New Zealand a few years ago
