You are talking about two different people. One of the captains in the video has resigned, after about 7-8 months, nowhere near to a year.
As to the other, maybe in LA more than in Taiwan, but lots of days in TPE as well. There is no LAX base. There are no bases other than TPE. In spite of that China Airlines continues to advertise that there is. As economical with the truth as any other outfit employing expats.