There's no NSExtensionItemActivationRule for video file size/length.

[paulrehkugler]

The reasons this is a technical limitation are twofold:

• NSItemProvider's items are asynchronously loaded
• There isn't any file metadata for length (i.e. you have to make an AVAsset to get the duration)

However, it doesn't make sense to share a video from a video editor and then be forced to edit again for length inside the extension.