Reasons for clicking favourite on things can include saving them to read, to listen to, or to watch, or to research, to respond to, and many people just use 'favourite' as an 'I agree' button (why they don't just boost things they like enough to click a button to agree with I don't know, but ...). I'd love to be able to sort my 'favourites' into categories, so I could click 'watch' if I'm looking for videos. Even better if I could sort worky videos separately from entertainment videos.