what types of video files can we import to Imovie?

Here is My problem:

I tried to import different types of video files, and is just the iMovie recognizes MOV and MP4. Furthermore, there is a problem with the transfer of video files through the duo-USB link. The only files that pass into the camera roll are also MP4 and MOV. I tried mov, avi, 3gp, wmv ones and it was not possible.

Is this possible?

please, someone can help me?

Vítor

IPAD PRO