This is a complex question that appears to be an essay draft as much as a question per se. The main problem with it as an essay is that it tends toward overgeneralization and hyperbole. Perhaps the most important revision would be to narrow the focus so that you can give more specific details supporting a thesis rather than a series of very broad claims.
The issue of relationships between Native Americans and European settlers is a good topic and has been widely explored in scholarship and popular culture. One could well claim that the history of discrimination and mistreatment of Native Americans has resulted in continued effects in the present. For example, Native Americans are still more likely to live in poverty, have shorter lifespans, and suffer from lack of access to everything from good education to medical care than people of European descent.
The discussion of the Trail of Tears is a good beginning, but YouTube is not considered a good or reliable source of information about anything, as anyone can post material on it, and the quality is variable. A better source would be the Cherokee Museum. After discussing the history of oppression of Native Americans and various breaches of treaties, you could look at the Wounded Knee Massacre and recent protests in the same area as well as issues such as the fight over the Dakota Access Pipeline.