The above video was published by the Bank of England in June 2016
From this page of the Bank of England , it is posible to get details of the security features of all current UK bank notes. From this page you can also download this pdf file in English, or Welsh about the new £5 note, and this "take a closer look" booklet about all notes in English or Welsh. The Bank also offers a free mobile banknote checker App for Android and iOS, with details here.