Mob demonstration:
https://www.youtube.com/watch?v=pauRVahrwJk
https://www.youtube.com/watch?v=8mCZisW3WxE

Farming skill:
https://www.youtube.com/watch?v=gCUsqNMN9eE

Fishing, Cooking, Mining, Party System
https://www.youtube.com/watch?v=Ht0GIkO2JWg

Woodcutting, Smithing, Fighting Mechanics
https://www.youtube.com/watch?v=kuO-9cELjT4

Shop & NPC
https://www.youtube.com/watch?v=WWoG_qspOkM

Supply Crates
https://www.youtube.com/watch?v=6xfJwLcTle4