Three customers at my restaurant made this documentary about Chang Chia-che (張嘉哲), a marathoner from Taiwan. There's some really good stuff here, for example, Chang's insights into competition: he feels a sense of achievement just from running. It's not necessary to win medals, etc. Chang lives in Yonghe (永和), so you'll probably recognize some of the scenery if you're Taipei-based.
I asked the film-makers how they expected to make any money. The doc is, after all, posted on YouTube. They said they didn't make this documentary with an expectation of making money.