Microsoft has launched a new app called Video Tuner which allows Lumia owners to edit clips and add effects to movies captured on their phone. Available to download from today, the app allows you_to quickly edit, re-crop, add a filter_and more in just a few presses. You can also use it to add a slow-motion section to your video, and all your subsequent creations_can be saved directly to OneDrive for storage or sharing. If you'd rather have some music instead of the original audio, you can use an non-DRM protected MP3 as the soundtrack – it'll need to be locally...