I was trying to delete some photos from my Iphone using Iphoto. Usually I could download all photos then press the delete button. When I
tried to download my photos Iphoto continued to have problems with one file so I could not download my files nor delete the files.
Was going to try to download them in batches then delete the selected photos to find the one photo that was an issue (assume you can do that). Before doing this I opened Image Capture and saw you could delete photos so I selected all of the photos and videos then clicked on the delete button. This deleted everything except for the one video that was giving me a problem.
Selecting that video and clicking delete got rid of the video leaving me with an empty camera roll.