Anyone familiar with Cologne will know that the underground stations look nothing as decrepit as that. Anyone familiar with Germany will know that there is no underground station looking as dirty as demolished as that.
What's more, English not being the national language, there won't be any "no smoking" signs and Arabic graffiti won't be seen either.
That vid has log since been debunked as not showing what is claimed here. It's also been around the net years longer than NYE 2015 in 2015.
Probably Cairo 2013.