The pair had won through to the decider earlier in November when the last 96 faced off in the early rounds in Wigan, but it was Van den Bergh who clinched the £10,000 title.
Belgian youngster Van den Bergh, who hit a nine-dart finish at the Grand Slam of Darts, got off to a flying start, landing a stunning 151 finish to go 3-0 up, averaging 111 as he went half-way to retaining his title.
Schindler held his nerve with a last-dart-in-hand double five to keep the tie alive at 4-2 and also landed a 13-darter to stay in touch at 5-3.
Van den Bergh, though, was not to be stopped as he romped to the winning line, coming close to breaking his own record average in a World Youth Championship final with a 100.44 total as he kept hold of the trophy.
“It feels incredible,” said Van den Bergh.
“I knew that I had the chance to make history and this is more beautiful than last year.
“Knowing that I’m back-to-back champion is something I will remember forever. I’m very, very happy that I played like I did because Martin is a fighter.”
Van den Bergh, 24, will now concentrate solely on the senior circuit and has set his sights on emulating last year’s run to the quarter-finals of the William Hill World Darts Championship at Alexandra Palace.
“In the World Youth Championship I’ve done my best and shown the young players that if you believe in yourself you can follow your dreams,” he added.
“I will be stronger now at the World Championship and will be focused on taking it step by step.”