Personally I use GIMP, but its a personal preference on which you use, to get the transparency on the 19xx theme, I opened up the image in paint.net, then saved as a .png image, then opened the theme up in gimp and cut inside the video border using the square selection tool in GIMP. If you place the newly updated 19xx that I did the video or snap should show through. EDIT* Once you do a couple of theme's and they are correct, it get's easier over time.