To be fair, what the guy said about the United States of America being a bully for the 120 years wasn't true. Up till 1949, the US was in fact one of the friendlier foreign imperial powers to China.
The americans had never colonised any part of China. They used Qing government's compensation for the tragic Boxer Rebellion to build Qinghua university. The Qing government also sent several cohorts of students to study at Yale.
But after ww2 USA had to take on the more domineering role in the world after Great Britain went bust