With Digital Camera's and Camcorder's some may need a codec pack to be installed to allow the video files to work with other programs.
Also, if an MP3 is to be set as the video/audio, a codec pack needs to be installed.
One of the most common codec packs is K-Lite codec pack and it is a free download. You can find the download for codec pack on Download.com. Click on the link below to be directed to the download site.
Once you have the codec pack installed try re-importing the video into VideoStudio, if the video still does not import or you are still unable to edit the video, contact the Corel Support Team