This is at least the second time this year that YouTube has increased its ad density. Over the past couple of years especially, the experience of using Google’s products overall has tanked as it squeezes users’ tolerance for advertising. It is able to do this because there are few true alternatives to Google’s core products.
You can pay Google ten bucks a month for YouTube Premium and get rid of ads, but that is really the only way to comfortably enjoy videos on the world’s most popular video platform. There are virtually no alternatives to YouTube — at least, none with such a huge library of original video.