Ya, YouTube follows copyright law as closely as it can or it would have been sued into oblivion. I have used a few copyright songs in videos and they usually don’t get outright blocked but the song creater counts those views towards revenue and if YouTube doesn’t have a song license for a country the video is blocked in that country. YouTube tells this to the uploader.
Related, H3H3 had a huge lawsuit about fair use over video clips because YouTube would handle it the same way - leave the video up but transfer all revenue to the clip holder. H3H3 ended up winning that but the point is YouTube is extremely pro copyright, erring on the side of copyright holder in all cases until convinced otherwise.