B-1/B-2 visitor visa to a green card
What is actually possible if your situation changes after you arrive.
Bangla VibesUS Tourist Visa to Green Card / আমেরিকা ভিজিট ভিসা থেকে গ্রীন কার্ড / Family-Based AOSThe video is older than this article, which was researched separately, so the two may not cover exactly the same ground.
What I wrote in 2021
To qualify for a US visitor visa, in other words a tourist visa, you have to establish that you do not have "immigrant intent", a plan to remain in the US permanently. That is a basic component of most temporary US visas. The American government wants to know you will leave before your visa or I-94 expires.
So if you are coming to America on a tourist visa intending to immigrate, meaning you plan to stay for good, this one is not for you.
This is for people who are already in the US as tourists and who, for some reason, cannot go home. A family member here has fallen ill, or your wife is pregnant, or you yourself have become sick. There can be all sorts of reasons. The point is that when you entered as a tourist you did not know about it. You can treat that as unforeseen circumstances. And you have a close relative here who is a permanent resident or a citizen.
I'll say it again: if it is established that you entered the US with the intention of immigrating, you will not be given the chance to change your visa and settle here. You will have to go back to your own country and process from there.