Question: Can I change YouTube thumbnail after posting?

Yes, you can change the thumbnail of a YouTube video after it has been posted. Here's how you can do it:

1. Sign in to YouTube Studio: Go to YouTube Studio and sign in with your account.

2. Select the Video: On the left-hand sidebar, click on 'Content' to see your uploaded videos. Find the video for which you want to change the thumbnail.

3. Edit the Video Details: Click on the video's title or thumbnail to open the details page.

4. Change the Thumbnail: In the 'Details' tab, you'll see the current thumbnail. Below it, there will be options to:

   • Choose from existing thumbnails generated by YouTube.
   • Upload a custom thumbnail by clicking on the 'Upload thumbnail' button.

5. Upload Custom Thumbnail: If you choose to upload a custom thumbnail, select an image file from your computer. The recommended size for a YouTube thumbnail is 1280x720 pixels with a minimum width of 640 pixels and a 16:9 aspect ratio.

6. Save Changes: After selecting or uploading the new thumbnail, click on the 'Save' button in the top-right corner to apply the changes.

Your video will now display the updated thumbnail. This process is simple and allows you to optimize your video's visual appeal even after it's been published.