The Reds midfielder came off the bench just moments before Antonio Valencia broke the deadlock with a fine individual strike at Ewood Park, before sealing three points with a superbly taken finish with just five minutes left.
"It was a massive win for us," Young told Sky Sports. "We knew if we could win here then we would go five points clear at the top. It was a great result and a great performance.
"It's a crucial time in the season - everybody in the team knows that. It's a squad game, that's what the manager has said and obviously there were a few changes tonight but everybody in the squad can do a job and we got it done tonight.
"It's a massive lead for us and it was a massive game for us. We knew we could get the first goal at some point, whether it was a shot or a cross from Antonio, we were just delighted to see it go in the back of the net. It was a great feeling when the first goal went in.
"For us to come here and get three points was great, we knew it was going to be a tough game. The boys were resilient throughout the game and we were always going to create chances, thankfully we scored one."