Then why hardly any Americans emigrate to China, but millions of Chinese have immigrated to USA. Facts like these blow your nonsensical statement out of the water.
The video is an AI channel that generates the video from a script and uses text-to-voice software like ElevenLabs for the audio. The video uses an avatar from HeyGen to lip-sync the audio. At least 80% of YouTube headless channels are now created this way.
As for losing our reserve currency status, China accepts USD payments because it depends on our huge market. They have to convert that to Yuan through FX to pay workers and invest in their own stocks and bonds rather than turning around and buying US assets in dollars.
When the Yuan is undervalued relative to the USD, this works to their advantage, but over time, it brings the currencies into parity. This makes its products less competitive, and it loses exports to countries like Vietnam and Malaysia. As long as China depends on large trade surpluses, it will be forced to periodically devalue its currency, as it has in the past. This is a huge risk to anyone who trades in Yuan.