Can you send me a link to the video you watched? I’m just also currently working on this issue in order to stay in the United States after studying at the university. Regarding the concept of this visa, as I understand it, the EB-3 visa is an employment-based immigrant visa that allows foreign nationals to apply for a green card based on a full-time job. After 5 years of residence in the United States under this visa, there is an opportunity to become a U.S. citizen. In general, the EB-3 visa solves the question of how to stay in the US after F-1 (I found this article on the eb3.work website). Therefore, I am currently considering this option to stay in the US. Although it takes quite a long time, about three years, so I think you need to start this process now.