This claim is misleading because Ukraine for one, is not a US colony, and Larry Johnson's claim of BlackRock and JP Morgan buying land in Ukraine is false.
https://www.bbc.com/news/world-europe-65969456 Affirms that both US financial firms are helping Ukraine's government to rebuild the damages caused by the ongoing conflict and war with Russia by investing so Ukraine will have jobs and innovation to drive the country's economy upward. Other companies like Coca-Cola are also spending money to rebuild constructions that have been damaged.
I would say that this Larry Johnson video is not a reliable source of information since the conversation was mostly exchanging opinions and critizicms on the situation with Ukraine and what could happen instead of focusing on the data and facts. The structure of the video was one of creating a conspiracy theory rather than proving a point with credible sources.
There are also not enough reliable sources that contradict or affirm any of the information spoken about throughout the YouTube video that this is true, since many of the available sites are biased to be either left or right. Many of the sites that agree with Johnson's statement derive from the east, such as Russia.
In the end, Ukraine remains an independent country and is recognized as a country by the US.
https://www.britannica.com/place/Ukraine
https://history.state.gov/countries/ukraine