video has emerged showing the horrific moment two french tourists set alight in rottnest island on april 3 .
the disturbing footage sees thibaud , 24 , and his cousin jean mickael batrikian , 18 , use a deodorant can and a lighter to set the marsupial alight in rottnest island working as cleaners .
they were each fined $ 4000 and will be held bars for seven days if they fail to pay the fines .