This is historical revisionism I'd say: the Bush admin basically turned the Clinton DOJ MS antitrust case into an anticlimatic slap on the wrist, and it had no material impact on MS' culture. People just think it changed MS' MO but in reality MS was fell victim to changing market dynamics throughout the tech sector.
YouTube the biggest ad platform on the world well they own it. They can charge competitor more or just simply have an ad to their console play in very vid its not like they have to pay $$ for it.
They can take a YouTube with 2 million subscribers and have them adversting their system and put the on the top 10 of trending,etc.
While there's no proof of them doing it(2 lazy to search lol), itn doesnt negate the fact they can do it.