# Use Youtube player (with Youtube AD) #<<<>>> # Use our player (Downlaod, Unblock & No Youtube AD) 再生できないときはここをクリック　click here if failed to load 如无法播放请点击这里#

INFO:
Segmenting a website's navigation by audience categories will often degrade usability, either because users belong in multiple categories, or because they feel the need to look at content targeted at several segments.
Audience-Based Website Navigation (Video) - NN/g