Haven't finished the video yet, it's long.
All of these terms are so difficult to pin down, globalism, nationalism, populism, even socialism. Is capitalism globalism? Does the existence of large multi-national corporations count as globalist or do we need to have a global unification policy from our government to count as globalist? Brexit I would assume is nationalism, but the UK doesn't want to cease trade with other nations, so is it nationalist? If Britain is participating in the world economy through trade and the presence of multi-national corporations, and participates in Climate Change initiatives and NATO, but doesn't want to be in the EU, are they globalist or nationalist? I guess the answer is a little bit of both.
I don't really understand the differentiation of regions or people into nation states. I get how they came about, but it seems so arbitrary to me. Human rights apply to every government on the planet. There isn't a government that should condone slavery, for example, and on and on. In reality, it shouldn't really matter which country you're in. Your local government should protect and adhere to your rights, and that doesn't leave a TON of room for differences. Sure maybe one nation has a stricter punishment for murder, or has different rules on public property, but at the big picture, it shouldn't matter. If you're entitled to free speech in the US because it is a human right, you're entitled to free speech everywhere. If you're entitled to equal protection of your government in the US because it is a human right, you're entitled to equal protection everywhere. And that means that women should be able to show their faces in public, own property, vote, and testify with weight equal to that of a man's testimony everywhere on Earth.
So if that's true, then nationalism is relegated to more of a "I like regional sport Team" role.
To the extent that people would like the American government to put American interests before any other interests, I would remind those people that taking into account the rights of others and responsibilities of government is taking into account American interests. It's like saying that you have freedom of speech but you want the government to infringe freedom of speech of those who aren't part of your group. Protecting your freedom of speech means protecting theirs as well.
Beyond that, what are we really talking about in terms of Trump's nationalist policy? Renegotiation of trade agreements? I don't think the government should participate in such nonsense. A higher tariff on one country vs. another is unequal protection of the law against individuals, including Americans what want to trade with people of different countries. If one American country wants to buy goods from China, and another American company wants to buy goods from Canada, and the government taxes one of those transactions higher than another... that is unequal protection of the law. So there should be no such thing as nationalist trade agreements with nations that are willing to capitulate to US terms.
TL;DR If I had my way, and government were limited enough, there'd be no such thing as nationalism or globalism.