Watch a Youtube trailer is free
Buy a console costs 400 USD
Youtube trailers don't even correlate well with box office performance which an average of less than 10 USD a ticket, let alone correlate with buying a console
In practice, social media only measures the reach and engagement of your marketing and advertising. How this turn into active buying consumers is a whole other story
That's said, it's actually great PS5 is moving those numbers, shows public is interested in the brand. Will this interest be enough to move huge numbers? We shall see