Many folks are tweeting that they are unable to see any YouTuber's channel pages, only to be met with an internal error 500. We just tried to open 10 channels from videos in our YouTube feed and all of them return the same error "500 Internal Service Error". Surprisingly, MKBHD's channel is seemingly the only one visible and working just fine. Even Casey Neistat's channel is returning the same error. Edit: MKBHD's Channel is down again. Current message when trying to open a user's YouTube Channel on a desktop. It's a little too late for this to be an April Fool's day prank and...
Source: https://www.gsmarena.com/partial_youtube_outage_channel_pages_are_returning_with_error_500-news-30387.php