Yuri loved potions - it was practical and working with his hands had always come easier to him than the bookish and academic subjects like arithmancy or divination. Give him some wand waving and potion stirring any day.
He listened to his instructions and when Mister Browne said to start he gathered his ingredients and started working, hoping to do enough to get through the first few rounds.

There were no other Hufflepuffs in his round, but he flashed a greeting glance at some of other students before setting about his own work. He finished the potion and raised his hand to indicate he was finished