Hi there! Second on my film trailer list is Ema Ryan Yamazaki. Her films are Neither Here Nor There, and Monk By Blood. Neither Here Nor There is an exploration of adult TCKs, their self-reflection, and their perspective on life and the world. Perhaps Monk By Blood is not necessarily about a TCK; however, I am including it because it is the work of a TCK, and I expect that many of the themes covered in it are applicable to TCK lifestyles and ideals.
You can learn more about Yamazaki here. Below is the trailer for the 35 minute documentary, Neither Here Nor There.
Monk By Blood is a series on Al Jazeera. I believe links to further videos can be accessed via their Viewfinder Asia page. Unfortunately, viewing restrictions for my country prevent me from seeing more than the trailer. So, if you are able to watch Monk By Blood, please look it up and let me know how it is.