https://www.cnet.com/news/youtube-says-its-channel-pages-are-down/

If you've been been getting an error message while searching for a YouTube video through a channel page, you're not alone.

The world's largest online video site, which is owned by Google, confirmed Monday that channel pages are down. To be clear, you can still watch videos on the site -- you just won't be able to find them by clicking on channel pages.