Offer expires on March 10, 2016.
How to redeem this app for free...
Download the Apple Store app for free here:
Launch the Apple Store app. Note: that this is not the App Store app.
Scroll down (the Featured page) until you see the section that says 'Make awesome videos.' Click on the link that says 'Download Videoshop - Video Editor free*'.
Click the green section that says 'Download now for free".
A popup will appear directing you to the App Store. Click 'Continue'.
Sign in to the iTunes Store by entering your password.
Click the 'Redeem' link, on the top-right side. The app should now install. You're done.
Link to videoshop app which is currently $1.99 otherwise: