Playlist Thumbnail width too large

Hi I have just noticed that when there is a playlist embedded on the page that the video width is breaking the div or something. On mobile phones it extends beyond the website area. Can you check this out? Here is an example.

Single video is fine. Also note that I have the width in the settings at 100%

https://www.learningguitarnow.com/wootest/test-single-video/

Here’s the playlist where it is too wide.

https://www.learningguitarnow.com/wootest/test-playlist/

Also the only plugins that are active are FV Player and FV Player Pro.

If I change this code then the width goes back to normal but I can’t pin down the exact CSS div.

element.style {
background-image: url(https://i.vimeocdn.com/video/657038207_1280x720.jpg?r=pad);
width: 1103px;
background-size: cover;
}

Thanks,

John