Well to be fair YT has made it confusing because some of the time it is. Some artists allow fan uploads like that and just collect the ad revenue off it.
So really in the modern era no copyright intended really is a message to the artist/label saying it's a fan video, they're not trying to impersonate the official one and asking for it to stay. The uploader might not know that that's what they're really asking but credit to YT for making this arrangement work to preserve some of the site's original culture.
