The Giver is an awarder working mainly as a complement to the Custom Counter interactivity, but it isn't its only function. Basically, keeping in mind the two types of givers, it can be a button or an automatic action which is giving the award as soon as the condition of success has been achieved.
In a nutshell: The Giver allows you to reward users for achieving successful actions.
The awarder offers one or another content based on the achievement of the established conditions. These conditions can be internal if they depend on a counter or might be external if they depend, for instance, on visiting a specific URL. The awards you offer for successfully achieving the given conditions will be based on your creativity. The Giver allows you to link to a specific video or URL according to the obtained result. These links could lead to a hidden video only accessible if the user has success, or to a form to get a physical award.