It's definitely not well executed but I think it's more complicated than you're portraying it because the competition isn't even. The size of the social network is definitely a factor but that's been built up by Google subsidizing YouTube for years and YouTube's costs can be artificially low because Google keeps a higher percentage of the ad revenue from their own ad network — they conspicuously still don't report profitability for YouTube — and heavily favors YouTube in search results to keep usage high.
Right now, if I search for “Lois van Baarle” on Google I see her Twitter account and then a bunch of YouTube hits. I have to add "Vimeo" to the query before I see a single hit from her preferred platform before the third page of results.
If this is true it seems pretty blatantly anticompetitive and a good reason for the EU to hit Google with another few €billion in fines until they knock it off.
Right now, if I search for “Lois van Baarle” on Google I see her Twitter account and then a bunch of YouTube hits. I have to add "Vimeo" to the query before I see a single hit from her preferred platform before the third page of results.