To increase the Skip time open the VideoFiche.htm file and search for
xmlHTTP.open("POST", 'http://127.0.0.1:8080/requests/status.xml?command=seek&val=' + (positiontag[0].firstChild.data * 1 + 5) + '%25', false);
change the "1 + 5" part to "1 + 10" or whatever value you like to look similar to this
xmlHTTP.open("POST", 'http://127.0.0.1:8080/requests/status.xml?command=seek&val=' + (positiontag[0].firstChild.data * 1 + 10) + '%25', false);
Also do this with the next line
xmlHTTP.open("POST", 'http://127.0.0.1:8080/requests/status.xml?command=seek&val=' + (positiontag[0].firstChild.data * 1 - 3) + '%25', false);
becomes
xmlHTTP.open("POST", 'http://127.0.0.1:8080/requests/status.xml?command=seek&val=' + (positiontag[0].firstChild.data * 1 - 10) + '%25', false);
The higher value you use the greater the skip!
Hope this helps.