Yamaha Yuuki (山葉夕來) is an English and Indonesian speaking Virtual YouTuber who focuses on automotive (mostly motorcycle) related video games and topics. A self-procaimed MotoVTuber, they're experimenting ways to incorporate motovlogging into the virtual space.
Project YMHYK is a botched attempt at copying human memories on an AI. That is, because the source of their memories originated from someone who have lost most of his in a motorbike crash. To study and analyze the reasons of the crash, they've taken up interest in motorbikes and started simulating the activity of riding motorbikes itself.
Apparently though, you can see bits of similarity in the personality of the real person and YMHYK, but the former passed away before this rumor was ever verified.