Html5 video thumbnail won't get displayed

Design help Custom code
1

For the life of me I cannot figure out why a thumbnail won’t show up.

Here’s my code.

<video width=100% height=auto poster=“https://dl.dropboxusercontent.com/s/f6inin9z7xhdlw0/Unveil_video_thumbnail.png” playsinline controls loop style="max-width: 890px;" onclick="this.paused?this.play():this.pause();">
2

You have invalid quotes “ instead of normal quotes ".

3

Thanks samliew,
I was able to achieve the same result by styling the embedded code and set a background image.