YouTube designs itself to keep users (a word often used for addicts) glued (read, "engaged") to the platform. It is built to draw people in and keep them there, thereby encouraging addictive behaviors. It is absolutely a problem with YouTube.
As someone who used to smoke, I can't believe that anything is as difficult as stopping smoking, but then Heroin Addicts enter the chat. So whereas to me, it seems incredible that people are addicted to content, it doesn't mean that how they feel about said content doesn't constitute a problem and where that lies on the scale for an individual is impossible to quantify from my narrow viewpoint and experience.