What does the word "kzaar" mean?

On a YouTube video I have heard a speaker of American English accent in a gaming context saying the exclamation:

Kzaaar!

Does someone know what that means and how to spell it correctly? This is the link to the video TITANFALL | The Online Gamer, they are just talking about a card game and then the boy says kzaar I think my strategy for the game would be the roll....

It sounds to me like a mispronunciation of huzzah, which is an archaic exclamation of delight, similar to the modern hooray.

Perhaps we'll never know what the gentleman is truly saying, but my view is that the most likely explanation is that the actor (perhaps prompted by the staff of writers attending to this point) intentionally chose to say "kuzzah," whether or not that exists as a word.

Existing answers stating that the word is "huzzah" or a mispronunciation of the same are overthinking the matter in my opinion. I don't think this actor felt compelled to say a pre-existing and accepted English interjection to express his character's pleasure in the moment. "Kuzzah" here has the effect of "huzzah." The "k" comes across as fairly intentional.

A comparison that occurs to me is the way some people say "yello" instead of "hello" when they answer the phone. And by "people," I'm primarily referring to the characters on Seinfeld.