You can change the thumbnail (cover image) of your videos in Moast to control what shoppers see before they click.
This helps you highlight the best moment in your video and improve engagement.
Steps to change your thumbnail
Go to your Media Library
Click on the video you want to update
Below the video, find the Cover image setting
Click the pencil icon
You’ll have two options:
Pick a frame from the video
Upload a custom image
Click Update
Things to Note:
Moast videos are vertical by default. For best results, use a thumbnail image with a 9:16 aspect ratio.
Recommended size: 1080 x 1920 pixels to ensure it looks sharp on all devices.
Using a thumbnail that’s too small or the wrong ratio may result in cropping.
Need help? If you have any questions, click the chat bubble in the bottom right corner and we’ll help you out.


