[NEW] Simply use html5 video tag, adding some js to support multi video player and playlist

             *       <img id=vdo_player_thumb data-thumb-for=player_id src=img.png/>
             *       <video width=550px height=380px controls id=player_id style=display:none>
             *          <source src=default_or_single_video.mp4 type=video/mp4>
             *       </video>
             *
             *
             *       <a href=# data-url=one_video.mp4 data-player=player_id class=player-link>Other video </a>
             *       <a href=# data-url=another_video.mp4 data-player=player_id class=player-link>Another video </a>