Demonstration of moving items (wooden planks in this occasion) between player inventory and a player-made container in the environment. Man made containers become crucial as the player creates more and more items, as he can carry only 20 items at once and will have to choose what he needs with him.
Demonstration of exchange between player inventory and player made containers. This functionality becomes vital early in the game as the player may only carry 20 items with him, and will thus have to store extra items in crates, stockpiles etc.