To make a custom thumbnail for YouTube, you can use editing tools available on your PC or Mac computer.

In this video, I show you how to use the new YouTube A/B Thumbnail Testing tool. This tool, which is now available to everyone, allows you to test different thumbnails to see which one performs ...

How to Pick a Certain Thumbnail for a YouTube Video. YouTube automatically selects a frame from each uploaded video for use as the video's thumbnail image.

How to to disable Taskbar Thumbnail Preview in Windows 7 using the Registry Warning: Improperly modifying the Windows Registry can cause Windows to not operate correctly.