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.
If you feel like chatting with others who also archive youtube content, consider stopping by my discord server: https://discord.gg/EJvS4kf
We maintain a list [1] of content that various members have archived, such that when content is removed from youtube, people can direct inquiries to contributors who have archived that content.
It's a small way to keep track of what things have been successfully archived, and occasionally direct efforts to preserve specific content- like unlisted videos right now.