Hello Dave,
If you look in your style.css (for your theme) around line 2201, you will find:
dl:not(.gallery) {
border: 1px solid #DEDEDE;
margin-bottom: 20px;
padding: 10px;
}
the "border: 1px solid #DEDEDE;" is causing those white boxes to appear. If you comment it out like this:
dl:not(.gallery) {
/* border: 1px solid #DEDEDE; */
margin-bottom: 20px;
padding: 10px;
}
then the boxes will go away, however this may effect other design aspects of your website.
In order to left justify the large video and the thumbnails, you will have to edit the tubepress.css file. In order to find the correct sections to edit, I would recommend using FireBug to look at the code of the displayed page and playing around with the CSS in there to make it look just the way you want.
For a responsive Tubepress, please see this post here: http://community.tub...tablets-phones/
Let us know how it goes!
Thanks!