they commented that videos taken with your camera, kodak use quicktimes (.mov), while ther brands use .avi and other formats
so nintendo will have to support atleast those two main formats
I doubt the HD will have a klite style codec pack which allows u to watch 99% of videos, but im sute it will support the commercial codec's used by camera's
im sure someone will make a psp style program which will allow u to change videos to these formats