I have varied interests, I sub and regularly watch a number if channels in each of my hobbies, but fixing cars is not one. However, one day I searched youtube how to change a bulb in a specific model of a car. This was a week ago. My youtube feed is still full of car repair howto videos. The people I'm subscribed to have produced new videos, but they don't show up.
Also I used to get recommended channels similar to ones I sub. No more. It looks 100% random now. I get recommended a random channel with 10 subs, but somehow I manage to miss one of the biggest channels in one of my hobbies for months.