Added video progress bar

I'd have to investigate this more, I don't really know much about styles.  I chose this particular one because simply because it gave me a progress bar with the exact dimensions I wanted.  I think I tried to use the holo style at one point and found it annoying because it would be something like 10dp vertically, but some of that was padding.  Maybe only ~4-5dp was actual progress bar.  It made it somewhat tricky to line it up properly at the bottom of the image.  The current style is nice because when I say give me 10dp height, the whole bar is 10dp.