No. I could have, but I just took the three parts of the frame they gave me and filled them all black.
It was your suggestion to eliminate the arrows. I left the two pieces on the sides to help me center the videos, and if I was going to add more videos, I might do this to make it obvious. Note that I added a red stroke of one pixel. You have to look closely.
If I wanted to, I could have simply taken out the border and replaced it with a Photoshop image where the single pixel width lines were to be exactly covered by the 1280X780 embedded video. Now that I think about it, a simple black box with guides that are to be covered exactly by the video makes a lot of sense. Hmmm... I think I will try that before finishing this post.
OK, I did it.
So, now the image looks like this. In Photoshop, I blew it up to around 400% to that I could place the red lines at exactly 31 pixels in from the edge. So they would be exactly covered. And then all of a sudden I realized that while the HTML said 1280X750, it was actually getting placed in at 1280X754, and I have no idea why that is.
So, back to Photoshop to bring the red markers in from the edge. I have to say this has been frustrating. I first tried using math to place the markers, then I gave up and just moved them around as needed to get it right. But even though the left and right side are even, when I use them as markers in Muse, the lower right protrudes farther than the top right, which makes absolutely no sense at all. However, it looks pretty decent if I just cover the markers. But it might be one or two pixels off from video to video. Quite annoying.
Anyway, check out the site now. It is now just a simple black box with guides to help place the video. Which means, it could be any image. Like theater curtains, or whatever.I thought I could just place it behind the lightbox, but that didn't work out because it kept becoming part of the lightbox.
So I created a new master page and put it there. You might have to mess with it a bit, but here is the PSD file. I exported it to JPG but if you are going to change it, you need the original.
http://www.stevengotz.com/files/Border-for-Muse.psd
Just to keep things neat, I created a copy of the page. You will find it here: lightbox-test-2
Testing shows the red markers when the videos change, so you will want to create a second master, one without the red markers. It is easy enough to change the master, add new videos, and then change the master back.