For example, video game streamers I follow on YouTube reacting to new game trailers is news to me. It’s how I learn of upcoming games, among other things.
The NYT and similar periodicals are no longer the gatekeepers of distributing new information and commentary.
They can compete in the new information landscape, but they no longer define it.
Journalists no longer need the periodical, they can work for themselves and distribute through Twitter, newsletters, etc.
In your example you’ve added a gatekeeper. If no one reacts to a trailer, you don’t know it exists. And in return you get neither trust—real companies don’t generally create trailers for fake products and if they did your gatekeeper might still react to it—nor access—the trailers are freely available, probably on the same platform you’re viewing the reactions on.
The Twitter user doesn’t ask questions or if he does they are the wrong questions of the wrong people. And why should he bother asking any questions? He’s not getting paid and his viewers aren’t generally seeking news.
That’s not to say Twitter couldn’t work this way, with Joe Random posting about things on his block. It just doesn’t work that way now because the incentives are just not there. My Nextdoor feed is full of news about my neighborhood, but it’s wrong as often as not. Having a setup like the GP suggests is basically necessary to develop trust between readers, authors, and sources, regardless of how the author delivers their content.