The same is true of Disney, Netflix and Prime, who also allow downloads to mobile devices, but not the Mac. The most curious thing about this particular issue is that YouTube allows YouTube videos to be downloaded to an iPad or iPhone (if you subscribe to YouTube Premium, $11.99/£11.99 a month, one-month free trial).
Making a copy of YouTube videos on an iPad or iPhone is really easy, but the same can’t be said if you want to save YouTube videos on your Mac. You can download those YouTube videos your kids (or you) love to watch to play back offline. If the idea of a long car journey or bedtime without a connection to the internet leaves you trembling with fear, there’s a solution.