Play
iOS iPadOS macOSPlay is the best way to bookmark and organize videos to watch later. Easily add, organize, and watch on your iPhone, iPad, Mac, Apple Vision Pro, and Apple TV.
💯ACK. The basic version of Play costs only $3, but the app really shines with an optional IAP that enables a feature called "Channels". It's basically an easy way to manage an inbox of all your youtube content. I am heavily displeased with the native youtube app on iOS and the user experience on youtube.com, with play it is IMHO much, much better.