Can't import mp4 files (no corrpution) into Photos
When I try to import mp4 files captured with a Samsung Galaxy S2 into Photos, I get the error: "None of these files can be imported into your photos library.". But I can import mp4 files captures with a Huawei Mate 7 into Photos (and jpg files from both phones). None of the files are corrupt, I can play them perfectly with any mp4 capable player. I run the latest versions of Photos and El Capitan.
Any idea what the problem might be ad how to solve it?
Thanks a lot,
lotlorien
OS X El Capitan (10.11.2)