PAL - Phase Alternating Lines
It's a TV broadcasting standard in Europe, Australia, parts of Africa, Asia and South America with 50 fields per second, the USA uses NTSC, which means there have to be 60 fields per second.
The 1080i50 means that the picture has a vertical size of 1080 pixel, is interlaced at 50 Hz (25 frames per second, but shown as 50 fields), but the USA uses a 60 Hz. It's dependent on the alternating current used in the specific countries where it was developed.
Maybe try 1080i60.
PS: What did you mean by "i went a dragged videos out,..."? English is not my parents' tongue.