Lightroom :: How To Import Photos Filtered By File Extension

I use a canon 5D Mk3 and a Sony nex 5. On both cameras, at import time, I am likely to have both movie files and still RAW files. I do not import my movie files into Lightroom, I import them into Final Cut Pro X, but I cannot find where in Lightroom I filter the import. At the moment I am having to painstakingly go through the import thumbnails and untick the movie files, which is tedious and prone to error (I missed importing an important RAW file the other day by unticking it by mistake. Lightroom is so professional and quick to use with its presets and customization.