wet floor pan

Hello Can anyone help with very wet floor in passenger side front footwell (Corsa C). Hard to find so far due to carpet and rubber floor covering. Back passenger side footwell also wet but think this is just due to slope of floor and leak / water ingress is in front. Note I have seen other...

As you can see from the video, that boot of my car and, behind the drivers seat the floor is wet. some times the floor behind the passengers side is wet as well, but its not as bad as the opposite side. I think the Passengers side could be to do with the scuttle drain, but i haven't got around...