This question will help the interviewer in understanding your problem solving skills and how you convince others. A good team player is the one who understands his team and also knows how to convince others.
Describe your process - is it by working with the team one-on-one to get their buy-in? Did you bring everyone into a room and whiteboard the fully vetted idea? Did you ask for the team to help you brainstorm it from being unpopular to becoming popular?
"Once I wanted to try doing X to improve our animation quality but we had never done that in our company before that day. When I presented that idea to others nobody was convinced, but then I decided to explain it to everyone in person and gave a presentation in front of everyone and I also addressed all the queries from my team in person. Once all the doubts were cleared we started working on it and then it actually turned out to be a really good idea and everyone was happy in the end."