The issue here is that Sarah Paine believes China is doomed because it is a continental power and subject to the disadvantages of being a continental power. However, all or almost all the characteristics described in the video show that China is closer to being a maritime power than the continental power Sarah Paine claims.
For example, in the video she states that the decision to remain a continental power stems from China having the Silk Road through Central Asia, highlighting the consistency of land-based communication projects and lines, forgetting the fact that China has its own Maritime Silk Road, while the land route is an alternative to the maritime route. She believes China is preferentially focusing on the land route, highlighting the disadvantage of China still being and continuing to be a continental power.