Show only images and videos in a wp.media window

It’s been a while since this question was asked, but on the off chance that you are still looking for a solution:

items_frame = wp.media.frames.items = wp.media({
    title: 'Add to Gallery',
    button: {
        text: 'Select'
    },
    library: {
            type: [ 'video', 'image' ]
    },
});