Well after taking the advice of guino. i went through and renamed all my music video and made snapshots(that will show in the preview window)
ie
Soulja Boy-crank dat.avi - this is the music video
Soulja Boy-crank dat.avi.jpg - i made a matching snapshot jpg to show in the preview window

Problem: it shows some and not others. It gets even weirder, the ones it does not show(preview window) while scrolling down the list, will appear while scrolling back up. I must say not all the videos show in the preview window regardless, it just shows about 3 while scrolling down and maybe another 2 -4 more while scrolling back up. It's always the same videos. I checked everything even the dimensions. Please help it's the only problem i have with rr everything else is fine.

Also how can i make the text smaller or different color