show dimensions of video file (mp4)

What I was looking for, from experience, were the dimensions displayed in Finder. Tonight, I discovered the dimensions displayed in Finder as I remember seeing them before. However, the same video file copied to another folder does not show the dimensions,. I don't understand why there is a difference. Here is a screenshot with annotations showing what I am looking at.

Urquhart1244 wrote:

In Finder:

⌘I

menu File﹥Get Info﹥More Info﹥Dimensions

In QuickTime:

⌘I

menu Window﹥Show Movie Inspector﹥Resolution

This worked

But the question remains, why aren't the dimensions displayed in Finder in all cases?

I am looking for acknowledgement this is an unnecessary hassle. For instance, why didn't the dimensions appear in Finder menu File﹥Get Info﹥More Info﹥Dimensions?