Hello !
I'm using a "a href" tag on every picture so user can quickly switch to the next album image (on image.php).
But of course, when it's a video, there is a problem. If you click on play, the page is changing because of the link ^^'.
Is there any way to ad a php"if" for filtering andremove the link. Thanks !

Yes, of course ;-) You can use this for providing diffferentt HTML for each:

 if (isImagePhoto()) {
     // "real" image
 } else {
    // non "image" image like video, audio or else
 }

Thank you acrylian !