A video mockup is a step-up when it comes to showing off your products. The best tool we've found is PlaceIt. It allows you to automatically generate a video with your design by simply uploading it to the site. Choose your shirt, upload your design, and it will make one for you. PlaceIt is definitely stepping up their game and so can you. We have a pretty sweet deal for you – when creating a new PlaceIt account through this link, you'll receive a 15% discount on single purchases for life or a 15% discount on the first month of any of their subscriptions.