The phrase "the ques" in your query likely refers to the full title suffix "," which is often used for these types of episodic fan animations.
"The Lost Slime Quest [vicinekohutao x slime the ques] – Hu Tao's Hardest Challenge" video title vicinekohutao x slime the ques
“Right. No mouth. But you know something.” The phrase "the ques" in your query likely