Yes. I always tell people that if they really love a YouTube video they need to archive it themselves. Tons and tons of content gets erased all the time for many different reasons. Just recently I found two of my favorite channels, popular around a decade ago, had deleted almost all their content because their jokes were too offensive for today's audience and they wanted to project a more mature aesthetic. That would've been a huge chunk of my early adulthood gone forever if I hadn't already had copies of all their videos.