I hope you guys can help me.

I have these file inputs in a form:

```
Select images: <input type="file" name="images[][image]" multiple>
Select videos: <input type="file" name="videos[][video]" multiple>

```

And my goal is to force the user to upload an image if there is no video introduced. Possibilities: 

* At least one image
* At least one video
* Any combination of images with
videos

What I want to avoid:

* No images and no videos

But I'm confused about the validation I need to use in my controller. This is what I have for the moment:

```
$this->validate($request, [
    'images' => 'required_without_all:videos.*.video',
    'images.*.image' => 'image',
    'videos.*.video' => 'mimetypes:video/avi,video/mpeg,video/quicktime,video/mp4'
]);

```

But it is not working. I also tried (without success):

```
$this->validate($request, [
    'images.*.image' => 'image|required_without_all:videos.*.video',
    'videos.*.video' => 'mimetypes:video/avi,video/mpeg,video/quicktime,video/mp4'
]);

```

How can I achieve what I want using Laravel's validation? 

Thank you very much in advanced.