Facebook takes its best guess when it comes to adding a thumbnail into your embedded links on your channel but sometimes it doesn't get it right. However, there is a way to select the image you want displaying on your post!

• Select the edit button of the post.
• Remove the link.
• Paste it into the post again.
• You should now be presented with a "left/right" arrow on the window which allows you to scroll through the images on the page until you find the one you want to display.
• Simply select the one you want and click "save".

Job done!