Youtube - Watch Later button

One of the features I love about Newsblur is the ability to subscribe to youtube channels. I can then use the feed to preview the videos the channels releases, and, on a desktop web-browser, use the “watch later” button to add the videos I want to watch to my Youtube "watch later queue. However, this ‘watch later’ button doesn’t show on the Newsblur iOS app. Would love if it could be added!