Halo is just on a different scale.
Of course those trailers are going to have more views now because look at how many people own a PS4 compared to a Xbox. What is it like 100M to 40M? I pointed out the Halo Infinite trailer views just to show that Halo is still a major IP that people still have interest in for those that think Halo is not big anymore.
We are talking about launch titles for next gen systems. Both systems will be starting from 0. The Last OF Us is just another Tomb Raider style 3rd person game. Been there and done that many times. Halo is on a different scale with deep lore, books, movies, tv shows and anime. Iconic names like Master Chief, Cortana, The Arbitor, and The Covenant. There is a reason why Halo is compared to a universe like STAR WARS. The Last OF Us will never be on that level. I would put God Of War above The Last Of Us as a bigger IP.
Halo Infinite will be a Xbox Game Pass title launching on Xbox Scarlett, Xbox One X, Xbox One S, STEAM, GOG, X Cloud and more when it launches. I will bet that no game launching on PS5 will be bigger than Halo Infinite.