Resolved Temporary set Resolution to 16:9

The player can play my game on PC with any resolution. This is intended and should not be changed.

But for cutscenes i need to enforce a 16:9 resolution to ensure they look good and certain objects are visibile or not visibile.

Question:
Is there a way to set the resolution temporary to a specific value (for me it's 16:9)?

Here is a fictive example:
I have these objects in my scene
A - Player
B - Egg
C - NPC


I need that the Player-A and NPC-C are visbile, but the Egg-B should not be visibile. I recorded the cutscene so that it works for a 16:9 resolution:



For wider resolutions i came up to add some movie stripes at the left and right corner. This is done with images on UI and works fine.


My problem
For resolutions where height is bigger than 16:9 aspect ratio i don't know how to achieve the 16:9 resolution with the camera being same distance.

 

I found it. For anyone who is interested or has a similar issue. For me the third answer in this thread worked:

https://forum.unity.com/threads/force-camera-aspect-ratio-16-9-in-viewport.385541/