When you edit your video, there are 5 ratios for you to choose from. Then, which one should you choose?

Widescreen (16:9; 21:9)

Widescreen is good for YouTube, Twitter, Facebook, films, etc.

Square (1:1) & Vertical (9:16; 4:5)

These kinds of ratios are suitable for Instagram, TikTok, Snapchat, etc.