When I look back on my first two applications, I think I tried to write what I thought they wanted to hear. My last three applications I focused more on my personal experience and stories instead of what I thought they might want (I realize this is realllly hard in 100 words) and made sure my writing (and what I said in my video) was really conversational. I spent a lot of time reading my answers/video script out loud to test that and edit.
That said, I think my last three applications were all strong/similar, so I do feel like when it’s your year, and they need someone like you, it just happens. Your application is likely perfect as it is! I think many “perfect” applications don’t make it every year.