YouTube is the most sought after destination for videos, but one thing lacking in YouTube is the preview function where in you can view clips from the video before actually viewing it completely. YouTube video preview is a nice extension for Google Chrome which allows you to preview YouTube video thumbnails before actually playing it. Using this tool, you can now make sure whether the video is genuine as mentioned in the title or not.
Once installed, you just need to hover on the video and you can view thumbnails from the videos. Here is a video of the tool in action.