Not videos but a very detailed tutorial by ED
http://moi3d.com/forum/index.php?webtag=MOI&msg=7389.1


or
http://moiscript.weebly.com/fiat-abarth.html by M-Dynamics


and a generic Nurbs car (not Moi but... by Cristobal Vila
http://www.etereaestudios.com/docs_html/nixus_htm/nixus_index.htm