Resolution of your renders for social media

Hey! Hello to you :slightly_smiling_face:

My question may seem silly to you, but I would like to render 400 frames for 15 sec of animation.

I have to optimize my rendering for social media and here 1080x1350 seemed to be a good ratio for an instagram publication ( ratio 4.5). My rendering will be done under cycles and 200 in samples, simplify is also enabled. Obviously, when you increase the resolution (I tried 2390x3051) the rendering is really good. How do you render good quality with social media resolution restrictions? should I increase the samples in the render?

thank you for your help :slightly_smiling_face: