Youtube is indeed a monopoly -- but it's not actually addictive. Since they started this war against adblockers I have found that I can perfectly live without it.
When I absolutely would like to watch an informative video (for example, about how to fix something on my bike, etc.), I first try to open the video in a private window (with ublock on); if that also doesn't work I try to use yt-dlp.
But I have completely stopped mindlessly watching videos that are not the result of a search.
There's nothing necessary about youtube.