Why waste time creating a state-of-the-art animated explainer when you only need to validate your project idea quickly? Create a GIF explainer instead. With GIFExplainer you can create presentation-like GIFs with rich text (including tables and lists), screenshots and graphic blocks like flowcharts.
Front page explainers of GIFExplainer and Helpinator were created in GIFExplainer itself. You can see them here:
To generate HTML code for explainers shown above use command available via Main Menu -> Create -> Create HTML wrapper for Explainer.