Please understand what we mean by aspect ratio! We don't need to see any websites for explanations.

When you try to resize the width of an image or video, you must proportionately resize the height also. For example if you reduce the width by 10%, also reduce the height by 10%. Otherwise people in the image will end up looking fat and short or thin and long as shown below

Original

Resized Disproportionately

Resized Properly

Original

Resized Disproportionately As on the current website

Resized Properly

In fact the above image must be resized and then uploaded instead of using a large sized one

Original size 13.3 KB

Resized 4.3 KB (300% reduction)

Video

Done using "scientific methods"

Resized using "common sense" How does using the above size affect the site layout? It is the same width as the other one, except a different height!