Thumbnail Previews feature is now available on the YouTube desktop website. This feature will show the users a preview of the video when they hover the cursor over the thumbnail. The previews are like GIFs and they are 3 seconds long. The YouTube creators/channel owners do not have any creative control over the Thumbnail Previews and the frames for the previews are selected automatically from the first half of the video.
This feature is quite beneficial for the viewers. The viewers can now hover over the thumbnail and get a preview of the video and decide whether they want to watch it or not. It will also help the users to identify whether the thumbnail of the video is the actual representation of the video.
YouTube team has announced about this feature on Friday (14 July 2017) through their Twitter account. This feature is only available for Google Chrome and Firefox web browsers. If you find this feature beneficial, let us know your thoughts in the comments.