Load GIF data based entirely on scroll position

[easytarget2000]

At the moment, the app loads the GIF data from the API "on launch". Instead, the data should be loaded based on the scroll position of the overview grid.
The grid starts out at position 0, there is no data for item 0, data for item 0 will be loaded. This process can automatically load a certain amount of additional items based on screen size and common scroll speeds.
For example: If a screen holds 20 items, the app should load 2 screens, 40 items.