Go back to 'Open With'
You should see a small check-box, 'Always Open With'
It is easy to miss.
I also get probs with mp4s and 3gps. But they do work sometimes. VLC almost always works for me.
See videohelp.com for extra info.
Alienware 17 R4 2017 review
These brilliant Lego posters show just what children's imaginations are capable of
Mac power user tips and hidden tricks
Comment réinitialiser votre PC, ordinateur portable ou tablette Windows ?