Is there a way to increase the vertical height of a StringProperty? My goal is to have a multi line text entry field.

I have applied a scale_y which works on operator buttons but doesn't seem to work on a StringProperty
sub = col.row()
sub.scale_y = 3.0
sub.operator("render.render")
sub.prop(scene.video_info,"video_description")
Edit for clarification
My objective is to have a text entry field that can accept an arbitrary amount of user input including multiple lines. I would want it to look something like this:

I know that the Enter key causes the input to be finished. I had made the assumption that could be disabled. If not then this question may be futile in the first place.
The "why" is that I have created an add-on to allow uploading rendered videos to Youtube from within Blender. This would be the description field for a video.

UILayout.split()to make columns using a percentage of the available width. See this answer – sambler Oct 09 '17 at 04:55split()helps to fit the property vertically @sambler. Out of curiosity: Can you elaborate on that please? AFAIK multi line is also not possible so there is no chance to achieve that. – brockmann Oct 09 '17 at 08:01