YouTube Miniplayer for Web

One of the best features of the mobile YouTube App is the mini player that lets you continue to watch a video while searching for the next one.
I'm missing this feature on the web version of YouTube so I created a mockup. (Even though I'm not a developer I'm aware that implementing this feature to a website ist difficult if not impossible.)

Check out the attachments to see the video player UI when hovering over it with the cursor.

What do you think of this idea?