It works for you because you have all the files and theme variations, It didn't work for me for me until I downloaded and moved some files to were they were expected to be.
Wow big diffference in assets quality. I would give the video frame a yellow tone like the eggs so it blends with the artwork and makes the logo pop out more but it's fine either way.
I think it's better to focus on filling the gaps rather than redoing things that are already made. but if you feel better redoing them rather than making new stuff then go for it, whatever makes you happier, I'm down.
Looks cool!
Please rename the title to a less generic one so more people can find it and download it. Something like "Coverbox Style BigBox theme for Playstation 3" or similar.