Pokemon Sword and Shield revealed trailer - 4.9M views and Sold over 18M units
Mario Kart 8 Deluxe revealed trailer - 11M viewsaviews sold over 26M units
Zelda BOTW official trailer - 16M views and sold over 20M units
Smash Ultimate announcement trailer - 5.8M views and sold 19.9M units
Super Mario Odyssey announcement trailer - 42M(holy shit) and sold only 18M units(lol)
Labo announcement trailer - 15M and sold ..... Flopped
Kinda pointless metric to use social media as the primary indicator of game sales.
Just FYI if a video gets put as an advertisement before other Youtube videos, which is something Nintendo Sony and everone else does, the views of the ad count to the trailer views.
So high view counts can just mean it got pushed a lot as ad.