The "aspect ratio" of a video refers to whether the video is horizontal (landscape mode, also referred to as 16:9), vertical (portrait mode, also referred to as 9:16), or square (a 1:1 aspect ratio).
If you want to change the aspect ratio on a video with captions, click here.
1. Go to desk.bigvu.tv
2. Open the relevant video.
4. Click on the 3 dots and select Style your video.

5. Click on Aspect Ratio and choose to resize with your preferences.

6. Click on the Make Video green button to apply the changes.
This option currently does not include cropping.