fix thumbnail generation

fix hardcoded paths
a lot of minor fixes

public/js/w0bmscript.js

@@ -1143,7 +1143,7 @@ $(function() {
         formData.append('file', file);
         $('.progress-striped, #upload-stats').css('opacity', 0).slideDown('fast').animate({opacity: 1}, {queue: false, duration: 'fast'});
         jqXHR = $.ajax({
-            url: '/api/upload',
+            url: '/api/video/upload',
             type: 'POST',
             data: formData,
             processData: false,
@@ -1443,4 +1443,4 @@ if( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(naviga
 newlink = document.createElement('a');
 newlink.setAttribute('class', 'mobiledetected');
 newlink.setAttribute('href', '/api/user/layout?layout=5');
-}
+}