Extended Disply Problem

[stublack]

Before I made any changes I had about 85% mp3+g and 15% videos. To add my watermark in every song I had to convert the mp3+g to video. The videos have been playing fine for years but when I add the watermark I have this weird problem. The former mp3+g songs converted to video have the problem with or without the watermark. I was checking these songs as I was converting and adding the watermarks and they were working fine on the laptop. Because I did not foresee that once I tried to play the songs on an extended screen that this problem would occur. It makes no sense to me and I was hoping there was a reason for this and some quick fix.