Joomla 3.0.
AllVideo folder settings:

Local Video Folder: images/stories/videos
Local Audio Folder: images/stories/audio

The video tath I'm using for the test is <IMG_0189.mp4> into the folder <images/stories/videos> and I have wote the following code into the article where I want to show the video:
{mp4}IMG_0189{/mp4}

Exatcly the path of te video is: </public_html/images/stories/videos/IMG_0189.mp4>

The web site page is:
www.cassiopeasailing.com/seminario-noleggio-occasionale

The error:

Error loading player:
HTML5 player not found

Thak you!