Personally I use Presentation to Video Converter. This is good software because convert PPT to video or flash without quality looses and quickly. I use this program long time and I haven't any problem with it. Also I burned my PPT onto DVD and watched it to my tvplayer. It works fine and I glad...
I use for cropping my video VidCrop. I have trial version without time limit and I haven't any problem when I edit or remove my fideo files.
Hope this helps!