Just to make it crystal clear:
Many times in the past I got (from Computer Magazines, off the net) various footage- .WMV, .AVI, .MPG etc.
Many times, while trying to import them in Premiere/AE, I got:
-black screens
-“format not supported”
-video without audio
-video with various artifacts (the original was fine, though)
So my question tried to prevent this from happening, by providing my exported videos with max compatibility, for further editing, by me or others.
Thanks for the info.