Passenger compartment air filter and fan

Two questions.

The first, how do I know if my car has an passenger compartment air filter and how to change it?

The second question, my AC fan makes loud noises for few seconds before it goes back quiet again when I have the AC on and come across rough road and or hit a hole on the road. I tried to have a look under there, but it is well covered with tons of screws which are at a very narrow places extremely hard to get into. Beside when It was this tough, I thought I might be mistaken about the location I am trying to gain access from.

Please any advice will be highly appreciated especially if it is a video supported to ease the pain on understanding what you are trying to explain.

Thank you