Here's the actual video source, skipped to the relevant context:

https://youtu.be/BrTT7dX0mcQ?t=851

And if you don't want that, a clip of the auto transcript I ripped from YouTube:

...And a very special thanks to some of the top industry leaders including somebody that's amazing. I said, "Look, we'll break this guy up." This is before I learned the facts of life. I said, "We'll break them up." They said, "No, sir. It's very hard." I said, "Why?" I said, "What percentages of the market does he have?" I said, "He has 100%." I said, "Who the hell is he? What's his name?" His name is Jensen Wong. Nvidia. I said, "What the hell is Nvidia? I've never heard of it before." He said, "You don't want to know about it, sir." I figured we could go in and we could sort of break them up a little bit, get them a little competition. And I found out it's not easy in that business. I said, "Supposing we put the greatest minds together. They work hand in hand for a couple of years." He said, "No, it would take at least 10 years to catch him if he ran Nvidia totally incompetently from now on." So, I said, "All right, let's go on to the next one." And then I got to know Jensen, and now I see why. Jensen, will you stand up? What a job. What a job you've done, man. Great. It's a great He's a great guy, too. Lisa...

Trump's clearly referencing learning about Nvidia in the past, and getting to know Jensen. He's telling a story about pondering breaking up Nvidia and putting together a government chip development effort before he learned the finer details on what they do. Tom's headline, on the other hand:

President Trump threatened to break up Nvidia, didn't even know what it was — 'What the hell is Nvidia? I've never heard of it before'

Is worded to imply Trump 'threatened' Nvidia blindly, or that he didn't know who Nvidia is during or just before the speech, cherry picking a quote with no context. It's technically plausibly deniable.

Call it what you want, but that is classic tabloid journalism from Tom's.

The headline contradicts what Trump was saying. It sort of contradicts their own article.