ELITE feature:

You can choose from 3 different Aspect Ratios for this shortcode, to match the aspect ratio of your Videos;

16:9: Choose this if your video is a standard, YouTube size HD video. If you shot your video on a mobile phone with the phone sideways (landscape), then choose this.

4:3: Choose this if your video is more squarish in shape. Older cameras created videos in this aspect ratio.

9:16: Choose this if it is a Vertical video (shot with your phone held normally, without turning it sideways)

For Non-ELITE licenses, the video is set to 16:9 by default and you will not be able to modify it.