It was Biarritz who clinched the victory with Yachvili kicking his side into the semi-finals but Young admitted after the game he was proud his team stuck at the task.
"I thought the players showed a lot of guts and determination to claw themselves back into it and with eight minutes to go it could have gone either way," he said.
"We have to be honest and say that at one stage we were dead and buried. If we had a little more fire-power we could have won it but I am not sure we would have deserved it.
"We were lucky at times but I was very proud of the team, especially the young guys.
"They gave everything and showed a lot of character and they will be better for the experience today.
"There is a disappointed dressing room in there but they should be proud of our run in this competition. We came up against some tough French sides and we gave a good account of ourselves. Today we lacked the fire-power of our opposition and Yachvili was outstanding but we can take the positives and move forward."