Hey Kung. The board width looks okay to me. From the pics and video, it seems like you have more toe overhang then heel. May need to adjust your bindings so your boots are more centered on the board's width. I have a Burton boot size US 10 with shrinkage. Another boot model US 11. I ride mid-wides and prefer them actually, so no problem. It's all riding style and preference. Go have fun, don't overthink it.
You won the rat race, you say? What does that make you... first rat?