After an Apple programmed HD substitution, I have restored the last TM backup (ALT and Power toghether). Since then Aperture is unable to read the .mov files I have in my library and to import new one (first "unsupported file format" and now simply doesn't see them on the camera card). With the pics import everything works.
I have tested the check that exclude video files and tried to change raw+jpeg pairs solutions as find in some discussions.
It seems that in the restoration from TM something like a codex has being lost.