Developers BC3 has updated their WP8.1 app Upload to Youtube, to version 2.1.
The app is designed specifically for Windows Phone 8.1, and lets you pick videos not just from your camera roll, but using a file picker from anywhere on your phone (such as the Downloads folder for example).
New in this version is a very significant new feature – the ability to upload video simply by using saying “Cortana, upload the last video to YouTube.”
The last video recorded will be uploaded automatically in the background.
Be warned though that while Upload to YouTube is free, the Cortana integration is a $0.99 in app purchase.
The update also brings more options when uploading, support for Norwegian, and also the usual bug fixes.
The app is free and ad-supported (though an IAP can remove the ads) and can be downloaded from the Windows Phone Store here.