Generic Research: Mirror Effect

 For my music video I wanted to have a first person mirror view scene somewhere at the beginning, where the person is looking into the mirror as if the camera is their eyes instead of having a camera to the side so I've been looking at different tutorials on YouTube that explain how to achieve that effect:

He uses Adobe which is a paid programme but I believe I can achieve the same effect on another program as long as I have the mask tool which is a key component in order for this to work

I looked at this shorter video to see what the effect would look like once it's finished and to see if it's actually what I want.

 

It's not going to look exactly like this but the main idea is there and I'll play around with it to fit what I want to achieve. 

I also did a little drawing to try and visualize my idea: 

It's very basic but it helps me envision what I have in mind and it prevents me from forgetting various ideas I have.