Fully searchable videos. Mobento's intention is to be a 'one-stop shop' for learning videos. Mobento vets and curates all the video resources, and aims for quality rather than quantity (on launch day they only had 200 videos listed). They are a video collection sourced from other collections such as Khan Academy, TED, Stanford and Yale.
One of the unique features is the search capability - it searches the entire library of videos for the words that were actually spoken.
My rating: 9/10