Is it normal? What can I do to fix it if not?

Anyone know what this leak is on the black tube? Any help is appreciated.

My 2007 XC70 is coming up on 100k miles soon and it's getting colder here in the northeast. Yesterday I was driving the car in the snow and I hear this really loud high pitched screeching noise coming from the front of the car (see attached video). I stopped the car and after remaining idle for a ...