3D Indicator like the new "4K"

That would be great because i have a lot of 3d movies and cannot see the difference between them other than the resolution.
Maybe using a specific file name structure like:

Gravity.3D.mkv

Or something like it.

Thank in advance.

It’s something wrong with this post ?
I cannot see it under the suggestions forum.

If you notice, posts in the suggestions sub are listed in order of number of up votes in the first post of a suggestion. That puts them in most requested suggestion order. Your post is currently on page 5 but if others like your idea it will move up the list.