It’s a pretty tepid way of thinking about the issue to be honest. In a strategic sense, basically any move Microsoft is forced to make for actual (rather than apparent) security makes it harder for them to do things in a way which creates lock-in. Yes, they will use it to push for DRM, as another commenter noted, but that’s another apparent security solution. In the long term, this is a positive, but it’s not an immediate and direct benefit, as the blog post notes.
Not a premium user but Youtube has poisoned its own waters with its algorithm. You can see the “top” content basically gaming that algorithm as well as it can. Literally every part of it from the title to the thumbnail to the content itself is hollow except for the skinner box.