To open a YouTube video’s thumbnail in a new tab: Find the video > Right-click its preview or thumbnail > Select “Open Image in New Tab”.
YouTube will now open the video-preview or thumbnail in a new tab on your browser.
Don’t want the video preview? First disable the auto-player.
After you do that, repeat the process to open it in a new tab and you’ll see the thumbnail itself β not the preview.
Related: How to open YouTube Videos in a New Tab.
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Thumbnail Test