For those who want to explain their products to customer in videos, these after effects templates might be right for you. They contain cool effects, animated and element for explain or work through.
Explainer Video Stickmania Template allows you to make your own animated
promos/explainer/commercials videos with amazing stickman.
Flat and modern app explainer is a template made in After Effects CS5 useful to show in 1 minute all features of your app to your clients.
Character City is an incredible animation factory, a complete explainer video toolkit.