After noticing how hard it was to create shots on Dribbble without the proper tools (e.g. After Effects), I decided to work on a tool to create animated mockup videos and GIFs on the web, for free. Using FabricJs I added a fully interactive canvas, and I thought I might as well add the option to add textboxes and images for more complex designs.
I've also open sourced the code, so if anyone wants to create something similar or expand on the concept you are completely free to (and encouraged to!) :)