'Magnus Carlsen' → 'YouTube URL' → 'https://www.youtube.com/watch?v=mVzOdnGz2WM' is incorrect, as this URL is a YouTube video posted by Magnus Carlesen's account, but not the primary and official YouTube profile URL associated with Magnus Carlsen.
'Croatia' → 'YouTube URL' → 'https://www.youtube.com/c/RoyalCroatianTours is incorrect, as this URL is not the primary and official URL associated with the country of Croatia, but rather a URL associated with one of Croatia's tourism groups.