VIDEOS WONT SHOW

Im getting Beyond frustrated, Im editing videos for my channel Friendly Fire and if the video wasnt taken on the iPhone Im editing on, it wont show up in iMovie, for example, when I click add video, I can see it as the folder image, but when I open the folder it isnt there. This app is frustrating but its the best one here.

Dierik about iMovie, v2.2.3