Videos missing from iPhoto after prompted to clear from memory card
I just imported a couple of videos from my GoPro camera into iPhoto. After the videos were imported, I created an album. Once the videos finished importing I was prompted on screen to erase the video's from the memory card and that the import was complete. I did erase them. I then imported more pictures and videos from my regular camera into iPhoto and also following the prompt to erase the memory card post import. The pics/video from the regular camera are there, but my GoPro videos are not. I cleared the memory card so I can't re-import them. It seems they have to be on the computer somewhere since it said "Import complete, Erase Memory Card". Are they still on here somewhere or gone forever?
iMac (27-inch, Late 2013), iOS 8.3