You can learn easy, short, and useful Korean phrases on King Sejong Institute’s YouTube channel.
The explanation is entirely in Korean (but there are hangul text) and the female narrator speaks slowly so it feels like having your own native Korean teacher. Oh, and there is romanization for the short conversations.
Here are some of the latest episodes:
Episode 43. 낯이 익어요.(nachi igeoyo.)= You look familiar.
Episode 42. 길이 너무 막혀요.(giri neomu makyeoyo.)= The road is jammed with traffic.