To answer your questions 1, 2, 3, and 4, I need the relevant citations or timestamps from the transcript. Please specify which sections of the transcript contain the answers.
This video features an interview with Van Vu, a Vietnamese YouTuber (@WhatThePho), by Travis from Travis Travels Vietnam. The main focus is Van Vu's experience of living in the USA for seven years before returning to Vietnam permanently. The conversation covers her reasons for moving to the US, her cultural observations, and her experience starting her YouTube channel.